Worldwide Volcano News
Volcanoes Today, 5 Mar 2021: Pacaya volcano, Fuego, Klyuchevskoy, Popocatépetl, Veniaminof, Raung, Sangay, Sakurajima
Raung volcano (East Java, Indonesia): near-constant summit explosions continue
Explosion generated an eruption column from Raung volcano summit crater on 2 March (image: @aris_volcano/twitter)

The explosive eruption of the volcano continues and has remained essentially unchanged at moderate levels. The activity is characterized by near-constant explosions from the summit vent within the Ijen caldera complex.
An explosions at the volcano produced a dense ash plumes, which reached approx. 14,900 ft (4,500 m) altitude and drifted most often E direction.
Seismic station detected continuous tremor with amplitude of 1-13 mm.
The warning bulletin states that ballistic impacts of volcanic bombs could affect an area of about 2 km distance from the main crater.
Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi volcano activity update 5 March 2021

Sakurajima Volcano Volcanic Ash Advisory: EXPLODED AT 20210305/0954Z OVER FL070 STNR OBS VA DTG: 05/0940Z
Satellite image of Sakurajima volcano on 5 Mar 2021
Popocatépetl Volcano Volcanic Ash Advisory: VA EM RPTD 05/0820Z to 21000 ft (6400 m)
Veniaminof volcano (Alaska): small eruption yesterday; Volcanic Alert Level raised to Orange
Webcam image of Veniaminof volcano yesterday (image: AVO)

The Alaska Volcano Observatory (AVO) reported that a small eruption producing minor ash emissions occurred from the summit crater starting around 05:13 local time yesterday.
Plume of ash rose to low altitude of 10,000 ft (3,000 m) and drifted S-SE as satellite imagery identified.
Fresh ash deposits are visible at the volcano's summit generated by the explosion.
Small ash content continued at the summit vent at 10:48 local time until visibility of the eruptive phase was limited due to dense clouds.
In addition, AVO recorded elevated surface temperatures detected in satellite data including continuous sulfur dioxide (SO2) emissions.
The alert level for the volcano was raised to "orange".
Source: Alaska Volcano Observatory volcano activity update 5 March 2021

Raung Volcano Volcanic Ash Advisory: VONA STATE ERUPTION TO FL140 AT 05/0805Z MOV NE
Suwanose-jima Volcano Volcanic Ash Advisory: EXPLODED AT 20210305/0631Z FL050 EXTD E OBS VA DTG: 05/0620Z
Satellite image of Suwanose-jima volcano on 5 Mar 2021
Sabancaya Volcano Volcanic Ash Advisory: UNABLE TO DETECT
Sangay Volcano Volcanic Ash Advisory: NEW VA EMS 05/0300Z to 22000 ft (6700 m)
Fuego Volcano Volcanic Ash Advisory: CONTG VA EMS. to 14000 ft (4300 m)
Klyuchevskoy Volcano Volcanic Ash Advisory: VA AT 20210304/2350Z FL160 EXTD E OBS VA DTG: 04/2350Z to 16000 ft (4900 m)
Satellite image of Klyuchevskoy volcano on 5 Mar 2021
Sabancaya Volcano Volcanic Ash Advisory: UNABLE TO DETECT
Pacaya Volcano Volcanic Ash Advisory: VA EMS HAS DISP
Suwanose-jima Volcano Volcanic Ash Advisory: EXPLODED AT 20210304/2132Z OVER FL030 EXTD E OBS VA DTG: 04/2120Z
Volcanic activity worldwide 4 Mar 2021: Etna volcano, Pacaya, Fuego, Popocatépetl, Dukono, Krísuv
Map of today's active volcanoes
Map of today's active volcanoes
Etna (Sicily, Italy): Less than 2 days after the previous lava fountaining episode (known as paroxysm), the 9th paroxysm took place from Etna's New SE crater this morning.
At first, it looked as if the volcano was going to produce the eruption already in the early morning hours: around 2 am local time, mild to moderate strombolian activity started at the New SE crater and soon became near-continuous. A lava flow started to flow from the eastern end of the deep fissure cutting through the cone, and slowly traveled eastwards. At the same time, volcanic tremor started to rise.
However, this activity slowed down again after around 3:30 am and ceased at around dawn, but only to restart about an hour later. From around 8 am, it again increased and this time developed into sustained tall lava fountains between around 9:30-10:30 local time. A tall ash plume rose approx. 4-5 km above the crater and spread into an umbrella cloud that drifted east and caused heavy ash fall in some eastern sectors and as far as Messina town.

Krísuvík (Southwestern Iceland): (4 Mar) The Icelandic Met Office (IMO) reported that seismicity on Reykjanes peninsula in the area between Krýsuvík, Kleifarvatn a Svartsengi volcanic system has been increasing during the past week.
The seismic activity started on 24 February accompanied by two moderate-to-strong volcano-tectonic earthquakes with magnitude M 5.0 and M 5.7 respectively and later that day another earthquake with magnitude M 4.8. Since the beginning of this unrest, 16 earthquakes above M 4 and 90 earthquakes above M 3 were detected by seismic network. The volcano-tectonic earthquakes were widely felt across SW part of the country including larger ones in the NW part as far as Ísafjörður.
... [read more]

Suwanose-jima (Ryukyu Islands): Volcanic Ash Advisory Center Tokyo (VAAC) issued the following report: EXPLODED AT 20210304/1322Z VA CLD UNKNOWN OBS VA DTG:04/1310Z

Pinatubo (Luzon Island): (4 Mar) The alert level for Mt. Pinatubo was raised today, 04 March 2021, from level 0 (quiet) to level 1 (low unrest). Since 20 Jan. 2021, a total of 1722 imperceptible quakes have been recorded by PHIVOLCS' Pinatubo Volcano Network (PVN). Latest measurements of CO2 and temperature on Feb. 2021, yielded slight increase. The CO2 flux measured was about 378 tonnes/day, still within the background range of 1000 tonnes/day.

Raung (East Java): Volcanic Ash Advisory Center Darwin (VAAC) issued the following report: VONA STATE ERUPTION TO FL140 MOV E AT 04/1654Z

Dukono (Halmahera): (4 Mar) Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Darwin warned about a volcanic ash plume that rose up to estimated 5000 ft (1500 m) altitude or flight level 050 .
The full report is as follows: VA TO FL050 OBS FM GND AT 03/2330Z, MOV SW OBS VA DTG:04/0012Z to 5000 ft (1500 m)

Popocatépetl (Central Mexico): (4 Mar) Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Washington warned about a volcanic ash plume that rose up to estimated 20000 ft (6100 m) altitude or flight level 200 and is moving at 10 kts in W direction.
The full report is as follows: NEW VA EM TO FL230 to 20000 ft (6100 m)

Pacaya (Guatemala): Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Washington warned about a volcanic ash plume that rose up to estimated 11000 ft (3400 m) altitude or flight level 110 .
The full report is as follows: NEW VA EMS to 11000 ft (3400 m)
...4 Mar:
The effusive-explosive eruption of the volcano continues at high levels characterized by strong strombolian activity from the Mackenney summit crater.
Judging from video record, another short lava-fountaining episode (so-called paroxysm) appeared from the summit crater yesterday that generated glowing lava bombs up to an approximate height of 500 meters above the summit as well as a tall and dense dark ash column that rose to estimated 11,500 ft (3,500 m) altitude extending about 25 km to the west of the volcano. Visibility of remaining lava fountains was very limited due to an ash clouds.
... [read more]

Fuego (Guatemala): Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Washington warned about a volcanic ash plume that rose up to estimated 14000 ft (4300 m) altitude or flight level 140 .
The full report is as follows: ONGOING VA EMS to 14000 ft (4300 m)

Sabancaya (Peru): Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Buenos Aires warned about a volcanic ash plume that rose up to estimated 24000 ft (7300 m) altitude or flight level 240 and is moving at 15 kts in SW direction.
The full report is as follows: PUFF EMISSIONS to 24000 ft (7300 m)
This morning's eruption column and ash plume from Etna's eruption, seen from the east near Giarre
Raung Volcano Volcanic Ash Advisory: VONA STATE ERUPTION TO FL140 MOV E AT 04/1654Z
Satellite image of Raung volcano on 4 Mar 2021
Fuego Volcano Volcanic Ash Advisory: ONGOING VA EMS to 14000 ft (4300 m)
Etna volcano update: 9th paroxysm with tall ash plume after less than 2 days
This morning's eruption column and ash plume from Etna's eruption, seen from the east near Giarre

Less than 2 days after the previous lava fountaining episode (known as paroxysm), the 9th paroxysm took place from Etna's New SE crater this morning.
At first, it looked as if the volcano was going to produce the eruption already in the early morning hours: around 2 am local time, mild to moderate strombolian activity started at the New SE crater and soon became near-continuous. A lava flow started to flow from the eastern end of the deep fissure cutting through the cone, and slowly traveled eastwards. At the same time, volcanic tremor started to rise.
However, this activity slowed down again after around 3:30 am and ceased at around dawn, but only to restart about an hour later. From around 8 am, it again increased and this time developed into sustained tall lava fountains between around 9:30-10:30 local time. A tall ash plume rose approx. 4-5 km above the crater and spread into an umbrella cloud that drifted east and caused heavy ash fall in some eastern sectors and as far as Messina town.

Strombolian activity at the New SE crater during the first phase early morning
Pacaya Volcano Volcanic Ash Advisory: NEW VA EMS to 11000 ft (3400 m)
Suwanose-jima Volcano Volcanic Ash Advisory: EXPLODED AT 20210304/1322Z VA CLD UNKNOWN OBS VA DTG: 04/1310Z
Satellite image of Suwanose-jima volcano on 4 Mar 2021
Pacaya volcano (Guatemala): two new lava flows; another short paroxysm episode
Thermal image of the three lava flows at Pacaya volcano (image: @insivumehgt/twitter)

The effusive-explosive eruption of the volcano continues at high levels characterized by strong strombolian activity from the Mackenney summit crater.
Judging from video record, another short lava-fountaining episode (so-called paroxysm) appeared from the summit crater yesterday that generated glowing lava bombs up to an approximate height of 500 meters above the summit as well as a tall and dense dark ash column that rose to estimated 11,500 ft (3,500 m) altitude extending about 25 km to the west of the volcano. Visibility of remaining lava fountains was very limited due to an ash clouds.
This event triggered a two new lava flows onto the S-SE-SW slopes of the edifice and branches off into several main arms. The lava on the south-southwestern flank keeping the flow active, currently about 1,100 m long.
Source: Instituto Nacional de Sismología, Vulcanología, Meteorología e Hidrología volcano activity update 4 March 2021

Krísuvík volcano (Southwestern Iceland): ongoing elevated seismic swarm; possibly upcoming eruption
Satellite image of ground deformation associated with N-S and E-W movement on the Reykjanes Peninsula (image: IMO)

The Icelandic Met Office (IMO) reported that seismicity on Reykjanes peninsula in the area between Krýsuvík, Kleifarvatn a Svartsengi volcanic system has been increasing during the past week.
The seismic activity started on 24 February accompanied by two moderate-to-strong volcano-tectonic earthquakes with magnitude M 5.0 and M 5.7 respectively and later that day another earthquake with magnitude M 4.8. Since the beginning of this unrest, 16 earthquakes above M 4 and 90 earthquakes above M 3 were detected by seismic network. The volcano-tectonic earthquakes were widely felt across SW part of the country including larger ones in the NW part as far as Ísafjörður.
A sharp peak in tremor was detected at 14:20 local time yesterday which has decreased and continued at reduced rate. The tremor was located 2 km southwest of Keilir on the Reykjanes peninsula.
There have been over 18,000 earthquakes at the time of this update since the seicmic activity started.
Significant ground deformation and location of the quakes in a N-S and E-W pattern suggests that a striking fault zone has been activated in this area. An InSAR interferogram showed left-lateral movement over a large section of the plate boundary.
The alert level for Krísuvík volcano was raised to "orange", as an increase of volcanic tremor has been recorded.
The ongoing elevated seismic swarm might be related with rock fracturing caused by a new batch of magma rising up to the surface. A new expected effusive eruption is likely upcoming in the next few hours.
Source: Icelandic Met Office volcano activity update 4 March 2021

Distribution of the earthquakes on the Reykjanes Peninsula on 25 Feb (image: IMO)
Distribution of the earthquakes on the Reykjanes Peninsula on 25 Feb (image: IMO)
Pinatubo volcano (Luzon Island, Philippines): Volcanic Alert Level raised to Yellow

The alert level for Mt. Pinatubo was raised today, 04 March 2021, from level 0 (quiet) to level 1 (low unrest). Since 20 Jan. 2021, a total of 1722 imperceptible quakes have been recorded by PHIVOLCS' Pinatubo Volcano Network (PVN). Latest measurements of CO2 and temperature on Feb. 2021, yielded slight increase. The CO2 flux measured was about 378 tonnes/day, still within the background range of 1000 tonnes/day.

Volcanic activity worldwide 3 Mar 2021: Etna volcano, Pacaya, Fuego, Klyuchevskoy, Popocatépetl, Kr...
Map of today's active volcanoes
Map of today's active volcanoes
Etna (Sicily, Italy): After yesterday's particularly long-lasting fire fountaining eruption from the New SE crater, activity had dropped back to similar levels as before.
Weak lava effusion, as well as secondary lava flows from sliding hot material on the steep slopes of the crater continued from the eruptive fissure of the New SE crater during the rest of the day and part of the night, but gradually died down.
... [read more]

Klyuchevskoy (Kamchatka): The flank-to-lateral effusive-explosive eruption at the volcano continues at moderate levels on the northwestern flank.
A new cinder has formed around the NW fissure vents and continues to grow with current height of 54 m and width of 101 m.
... [read more]
...3 Mar:
The flank-to-lateral effusive-explosive eruption at the volcano continues at moderate levels on the northwestern flank.
A new cinder has formed around the NW fissure vents and continues to grow with current height of 54 m and width of 101 m.
... [read more]

Sakurajima (Kyushu, Japan): (3 Mar) Volcanic Ash Advisory Center Tokyo (VAAC) issued the following report: VA AT 20210303/0103Z 5NM W OF RJFK FL060 EXTD S REPORTED

Suwanose-jima (Ryukyu Islands): Volcanic Ash Advisory Center Tokyo (VAAC) issued the following report: EXPLODED AT 20210303/1317Z FL040 EXTD W OBS VA DTG:03/1310Z

Raung (East Java): Volcanic Ash Advisory Center Darwin (VAAC) issued the following report: VA ERUPTION TO FL145 MOV EAST OBS VA DTG:03/1047Z

Ibu (Halmahera, Indonesia): Volcanic Ash Advisory Center Darwin (VAAC) issued the following report: VA REPORTED TO FL070 MOV S OBS VA DTG:03/0957Z

Krakatau (Sunda Strait, Indonesia): Typically, volcanologists rely on information and evidence of past volcanic events to infer and predict the behaviour of future eruptions. However, a recent study by Madden-Nadeau et al. (2021), published in the Journal of Volcanology and Geothermal Research, took this one step further and utilised a recent, devastating volcanic hazard – a tsunami triggered by volcanic collapse – to shed new light on the eruptive sequence of an event from over 100 years ago.
In 2018, a large tsunami triggered by the collapse of Anak Krakatau stripped vegetation from nearby shorelines and thus exposed sequences of the 1883 eruption – arguably the deadliest and most destructive volcanic event recorded in human history.
... [read more]

Semeru (East Java, Indonesia): (2 Mar) Volcanic Ash Advisory Center Darwin (VAAC) issued the following report: VONA STATE VA ERUPTION TO FL140 AT 02/2256Z

Popocatépetl (Central Mexico): Volcanic Ash Advisory Center Washington (VAAC) issued the following report: NO VA OBS.

Pacaya (Guatemala): Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Washington warned about a volcanic ash plume that rose up to estimated 12000 ft (3700 m) altitude or flight level 120 .
The full report is as follows: NEW VA OBSD to 12000 ft (3700 m)
...3 Mar:
The effusive-explosive activity at the volcano has been increasing during the past few weeks characterized by strong ash emissions and sporadic series of small paroxysm with pulsating lava fountains.
On 21 Febraury a small-to-moderate intermittent lava-fountaining eruptive episode (likely to be classified as paroxysm) occurred at the volcano's Mackenney summit crater (as can be seen in the video below) as a result of continuing elevated strombolian activity
... [read more]

Fuego (Guatemala): Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Washington warned about a volcanic ash plume that rose up to estimated 15000 ft (4600 m) altitude or flight level 150 .
The full report is as follows: VA EMS CONTINUES to 15000 ft (4600 m)

Sabancaya (Peru): Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Buenos Aires warned about a volcanic ash plume that rose up to estimated 26000 ft (7900 m) altitude or flight level 260 .
The full report is as follows: INTERMITTENT EMISSIONS to 26000 ft (7900 m)

Volcano Activity Summary for 3 Mar 2021:

Residual lava effusion at New SE crater (l) and vigorous strombolian burst from Voragine (c) last night
Etna volcano update: New SE crater calms down, while central crater shows impressive fireworks
Residual lava effusion at New SE crater (l) and vigorous strombolian burst from Voragine (c) last night

After yesterday's particularly long-lasting fire fountaining eruption from the New SE crater, activity had dropped back to similar levels as before.
Weak lava effusion, as well as secondary lava flows from sliding hot material on the steep slopes of the crater continued from the eruptive fissure of the New SE crater during the rest of the day and part of the night, but gradually died down.
Seemingly unaffected by the activity of its younger neighbor, the central summit crater Voragine has continued to show sometimes strong strombolian explosions at intervals ranging from 5-10 minutes. Judging from our visual impression over the past few days, this activity appeared to have increased since yesterday.
Whether or not Etna is heading to another paroxysm in the near future remains open to speculation, but based on the currently still quite regular rhythm of so far 8 episodes in just two weeks, it seems rather likely that another one could be expected to occur in the next 1,2 days.

Closer view of the New SE crater with the cooling main lava flow from the previous paroxysm to the lower left and a small still active flow from the eastern end of its eruptive fissure
Klyuchevskoy volcano (Kamchatka): flank-to-lateral eruption continues; new cinder cone formed
Lateral eruption on NW flank of Klyuchevskoy volcano (image: volkstat.ru)

The flank-to-lateral effusive-explosive eruption at the volcano continues at moderate levels on the northwestern flank.
A new cinder has formed around the NW fissure vents and continues to grow with current height of 54 m and width of 101 m.
Actively growing cinder cone generates a scoria (incandescent material ) that is ejected to an approximate height of 50 meters above the crater and causes phreatic explosions at the contact with lava, ice and snow in the area of Erman glacier.
A gas-steam plumes containing some amount of ash is extending about 3 km to the SE of the volcano with an altitude of 6,900 ft(2,100 m).
The advancing lava flow continues to emerge from the NW fissure vent that melted snow and caused lahars which traveled along the Krutenkaya river.

Phreatic explosions generates gas-steam plumes from the new formed cinder cone (image: volkstat.ru)
Klyuchevskoy volcano (Kamchatka): flank-to-lateral eruption continues; new cinder cone formed
Lateral eruption on NW flank of Klyuchevskoy volcano (image: volkstat.ru)

The flank-to-lateral effusive-explosive eruption at the volcano continues at moderate levels on the northwestern flank.
A new cinder has formed around the NW fissure vents and continues to grow with current height of 54 m and width of 101 m.
Actively growing cinder cone generates a scoria (incandescent material ) that is ejected to an approximate height of 50 meters above the crater and causes phreatic explosions at the contact with lava, ice and snow in the area of Erman glacier.
A gas-steam plumes containing some amount of ash is extending about 3 km to the SE of the volcano with an altitude of 6,900 ft(2,100 m).
The advancing lava flow continues to emerge from the NW fissure vent that melted snow and caused lahars which traveled along the Krutenkaya river.

Phreatic explosions generates gas-steam plumes from the new formed cinder cone (image: volkstat.ru)
Modern volcanic hazards shed light on historic caldera-forming events
The 1883 eruption destroyed much of Krakatau Island, forming a submarine caldera. Rakata Island in the background is the truncated rim of the 1883 caldera and Anak Krakatau in the foreground is a post-caldera cone that first emerged from the sea in 1929 and has been frequently activity since (Image: Volcanological Survey of Indonesia).

Typically, volcanologists rely on information and evidence of past volcanic events to infer and predict the behaviour of future eruptions. However, a recent study by Madden-Nadeau et al. (2021), published in the Journal of Volcanology and Geothermal Research, took this one step further and utilised a recent, devastating volcanic hazard – a tsunami triggered by volcanic collapse – to shed new light on the eruptive sequence of an event from over 100 years ago.

In 2018, a large tsunami triggered by the collapse of Anak Krakatau stripped vegetation from nearby shorelines and thus exposed sequences of the 1883 eruption – arguably the deadliest and most destructive volcanic event recorded in human history.

The Krakatau archipelago is part of the Sunda Arc. Volcanism in this region is a result of the subduction of the Indo-Australian Plate beneath the Eurasian Plate. The eruption of Krakatau volcano on 26 and 27 August 1883 was the culmination of at least four months of unrest (for detailed precursory timeline see Madden-Nadeau et al. 2021). The 1883 eruption is one of the most infamous volcanic disasters, and the first caldera-forming eruption in human history to make headline news around the world thanks to the invention of the first transatlantic cable a few years prior to the eruption, allowing information to be globally distributed quickly – in essence, this eruption was the first ever global media event.

The event caused around 36,000 fatalities, the majority of deaths attributed to the numerous volcanogenic tsunami triggered by pyroclastic density currents (fast-moving currents of hot gas and volcanic matter) entering the sea. Impacts were not localised, in fact shockwaves from the final cataclysmic eruption circumnavigated the globe 7 times and the enormous volume of volcanic aerosols/ dust injected into the stratosphere lowered global air temperatures by 1.2 degrees Celsius. For many months after the eruption, vivid sunsets were observed around the world caused by these aerosols. This was a VEI (Volcanic Explosivity Index) 6 event.

The aim of the study was to integrate the known eruptive progression at Krakatau in 1883, based on historical accounts, with new studies of the stratigraphy, crystal zoning and glass geochemistry.

This study presents field observations from new 1883 eruptive deposit exposures of Krakatau, and has allowed for the stratigraphy of the eruption to be considerably better constrained – petrological tools can offer a unique insight into the architecture of pre-eruptive magma plumbing systems, and the conditions leading up to eruption. This research suggests an alternative model for the magmatic system below Krakatau (at the time of eruption) considering the findings of chemical variations in the stratigraphic sequence, previously unknown. The analysis of the freshly exposed sequences also indicates substantial change in the direction of the pyroclastic density currents during the final eruptive phase in 1883. For further detail on the stratigraphic analysis carried out, see Madden-Nadeau et al. article (link below).

Long-term shifts in eruptive style are poorly understood in general, particularly for caldera systems, as there has not yet been the opportunity to monitor any volcano during the long-term build-up to a caldera-forming eruption. This can create uncertainty in the interpretation of contemporary geophysical data with reference to volcano monitoring. As the study concludes, ‘The 1883 eruption of Krakatau provides an example of an event where relatively moderate explosive eruptions may potentially have run-away effects culminating in cataclysmic caldera-collapse several months later.’ This is a useful insight for the volcanology community to be aware of for future monitoring of similar volcanoes likely to produce caldera-forming eruptions.

This innovative study provides new evidence for the role that precursory eruptions and amalgamation of shallow crustal magma bodies potentially play in the months leading up to caldera-forming eruptions, such as Krakatau 1883.

Eruption of Anak Krakatau in December 2018 which triggered onset of deadly tsunami, killing 430 people, and injuring many more. Tsunami stripped vegetation from surrounding coastlines, thus exposing stratigraphy that would help scientists better understand the 1883 eruption and the precursory phases leading up to a large, caldera-forming event (Image: El Ghazali/ National Geographic).
Pacaya volcano (Guatemala): small paroxysm indeed with pulsating lava fountains
Lava fountaining at Pacaya volcano generated dense dark ash plume (image: INSIVUMEH)

The effusive-explosive activity at the volcano has been increasing during the past few weeks characterized by strong ash emissions and sporadic series of small paroxysm with pulsating lava fountains.
On 21 Febraury a small-to-moderate intermittent lava-fountaining eruptive episode (likely to be classified as paroxysm) occurred at the volcano's Mackenney summit crater (as can be seen in the video below) as a result of continuing elevated strombolian activity
The explosions continue to generate glowing lava bombs ejected to an approximate height of 300 to 500 meters above the crater. The regular constant ash emissions reached up to 11,100 ft-13,129 ft(3,400 m-4,000 m) altitude and extended about 10 to 25 km to the S-SW of the volcano.
The eruptive fissure, opened on the south-southwestern flank at about 300 m distance from the summit, remains active and continues to emit the lava flow, currently about 1,100 m long. The lava effusion generated a small avalanches that lifted ash plumes (so-called phoenix clouds) as it descended the slope. In addition, near-constant glow from the summit crater is associated with this activity.
Seismicity is characterized by near-constant periods of high amplitude tremor including sharp peak on 1 March as a rising magma at shallow level pushed its way up to the surface.
Source: Instituto Nacional de Sismología, Vulcanología, Meteorología e Hidrología volcano activity update 3 March 2021

The lava flow on S-SW flank generated a small avalanche that lifted ash plumes as it descended the slope (image: INSIVUMEH)
Volcanic activity worldwide 2 Mar 2021: Etna volcano, Fuego, Popocatépetl, Reventador, Sangay, Sina...
Map of today's active volcanoes
Map of today's active volcanoes
Etna (Sicily, Italy): After little more than 2 days since Sunday's paroxysm, the 9th such episode of vigorous lava fountaining from the volcano's New SE crater occurred this afternoon. It was remarkable for its long duration.
Around noon, first signs of reactivation of the New SE crater could be noticed in the form of small, intermittent strombolian-type explosions. Starting from 13:24 local time, volcanic tremor began to rise sharply, the typical sign for the impending onset of a new paroxysm (lava fountaining episode).
... [read more]
...2 Mar:
For now, the volcano has remained mostly calm 48 hours since the latest lava fountaining episode.
Intermittent strombolian explosions with mild ash emissions continue from the Voragine crater, while the New SE crater is emitting steam and dilute ash plumes. At night, a glowing spot at the eastern end of the eruptive fissure could be seen, but no explosions.
Volcanic tremor levels are at low levels, something that can change quickly.

Ebeko (Paramushir Island): (2 Mar) Volcanic Ash Advisory Center Tokyo (VAAC) issued the following report: ERUPTION AT 20210301/2332Z FL070 EXTD SE REPORTED OBS VA DTG:01/2330Z

Suwanose-jima (Ryukyu Islands): Volcanic Ash Advisory Center Tokyo (VAAC) issued the following report: ACTIVITY CONT. VA AT 20210302/1800Z FL040 EXTD S OBS VA DTG:02/1750Z

Sinabung (Sumatra, Indonesia): A large collapse of the active lava dome generated a massive pyroclastic flow this morning, that traveled about 5 km and generated a huge ash cloud that also rose about 5 km above the volcano.
During January to March 1, 2021, the volcano observatory had registered 37 explosive eruptions, resulting in ash columns reaching up to 1000 m from the summit of the volcano. Small to medium pyroclastic flows (avalanches of hot material caused by collapses on the unstable flanks of the dome) had been reaching distances of 1500-2500 meters from the summit towards the east, southeast and south.
... [read more]

Popocatépetl (Central Mexico): Volcanic Ash Advisory Center Washington (VAAC) issued the following report: VA EMS HAVE DISP IN STLT IMAGERY

Fuego (Guatemala): Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Washington warned about a volcanic ash plume that rose up to estimated 15000 ft (4600 m) altitude or flight level 150 .
The full report is as follows: OCNL VA EMS OBS IN STLT IMAGERY to 15000 ft (4600 m)

Sangay (Ecuador): Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Washington warned about a volcanic ash plume that rose up to estimated 22000 ft (6700 m) altitude or flight level 220 .
The full report is as follows: VA CLDS OBS IN SUMMIT WEBCAM to 22000 ft (6700 m)

Reventador (Ecuador): Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Washington warned about a volcanic ash plume that rose up to estimated 15000 ft (4600 m) altitude or flight level 150 .
The full report is as follows: OCNL VA CLDS OBS IN SUMMIT WEB CAM to 15000 ft (4600 m)

Sabancaya (Peru): Volcanic Ash Advisory Center Buenos Aires (VAAC) issued the following report: INTERMITTENT EMISSIONS
Lava fountain during Etna's paroxysm this afternoon (image: Tom Pfeiffer / VolcanoDiscovery)
Sinabung volcano (Sumatra, Indonesia): series of massive hot avalanches generate huge ash plumes rising 5 km into the sky
Hot avalanche and ash plume from Sinabung earlier today (image: VSI press release)

A large collapse of the active lava dome generated a massive pyroclastic flow this morning, that traveled about 5 km and generated a huge ash cloud that also rose about 5 km above the volcano.
During January to March 1, 2021, the volcano observatory had registered 37 explosive eruptions, resulting in ash columns reaching up to 1000 m from the summit of the volcano. Small to medium pyroclastic flows (avalanches of hot material caused by collapses on the unstable flanks of the dome) had been reaching distances of 1500-2500 meters from the summit towards the east, southeast and south.
However, this morning's event far surpassed anything observed at the volcano in recent years: starting at 06:42 local time, a series of collapse events triggered hot avalanches that traveled 2000 to 5000 m to the southeast and east, with ash columns rising 4000 to 5000 m from the body of the hot avalanche cloud (known as phoenix clouds). Until 08:20 local time, the volcano observatory reported a total of 13 such pyroclastic flows.
Fortunately, there are no reports of fatalities or injuries - the affected areas all have been devastated by earlier events in the past years since the reawakening of the volcano in 2013.
Impressive photos of the events can be found all over the web, especially social media like Twitter:

Billowing ash plume from Sinabung (image: Nachelle Homestay / twitter)
Billowing ash plume from Sinabung (image: Nachelle Homestay / twitter)
Etna volcano update: New lava fountain episode showers villages with ash
Lava fountain during Etna's paroxysm this afternoon (image: Tom Pfeiffer / VolcanoDiscovery)

After little more than 2 days since Sunday's paroxysm, the 8th such episode of vigorous lava fountaining from the volcano's New SE crater occurred this afternoon. It was remarkable for its long duration.
Around noon, first signs of reactivation of the New SE crater could be noticed in the form of small, intermittent strombolian-type explosions. Starting from 13:24 local time, volcanic tremor began to rise sharply, the typical sign for the impending onset of a new paroxysm (lava fountaining episode).
The strombolian activity at the New SE crater quickly increased to become sustained lava fountains, which lasted for almost 2 and a half hours! Activity reached its climax around 15:00-15:30 and quickly decreased from 15:40 and ceased at 15:50. Unfortunately, most of the time, the summit region of Etna was hidden in clouds, but a brief window towards the end of the eruption allowed Tom and Marco to witness this extraordinary event from close.
As during the previous episodes, voluminous lava flows were erupted to the east into Valle del Bove and likely also to the south towards the Torre del Filosofo area.
A tall ash column rose to an unknown height, but of at least several kilometers. It was pushed and bent by northerly winds towards the south, where its fallout caused heavy ash fall on the southern slopes of Etna, in particular in Nicolosi village, San Gregorio, Trecastagni, Aci S. Antonio, Pedara as well as in the City of Catania.
The Fontanarossa airport of Catania was temporarily closed down due to the volcanic ash fall.

Eruption column above the New SE crater (image: Tom Pfeiffer / VolcanoDiscovery)
Eruption column above the New SE crater (image: Tom Pfeiffer / VolcanoDiscovery)
Etna volcano update: Volcano remains quiet for now
Etna's summit region seen from the east this morning. New SE crater to the left, and a small ash plume emitted from the Voragine (center) is visible.

For now, the volcano has remained mostly calm 48 hours since the latest lava fountaining episode.
Intermittent strombolian explosions with mild ash emissions continue from the Voragine crater, while the New SE crater is emitting steam and dilute ash plumes. At night, a glowing spot at the eastern end of the eruptive fissure could be seen, but no explosions.
Volcanic tremor levels are at low levels, something that can change quickly.

Current tremor signal (image: INGV Catania)
Volcanic activity worldwide 1 Mar 2021: Etna volcano, Fuego, Popocatépetl, Reventador, Sangay, Saku...
Map of today's active volcanoes
Map of today's active volcanoes
Etna (Sicily, Italy): Weak activity continues last night at the New SE crater, with weak lava flow emission from the eastern end of the main eruptive fissure, but gradually ceased during the night.
Volcanic tremor has again decreased to low levels.
... [read more]
...1 Mar:
The latest lava fountaining episode, or paroxysm, occurred in the morning of Sunday 28 Feb 2021, after a longer interval than the previous 7 ones. After roughly three and a half day, the awaited number 8 episode of the current series of paroxysms occurred Sunday morning around 9 am local time.
Different from the previous ones, the activity increased from very low levels to strong lava fountains in an extremely very short time. First signs of reactivation of the New SE crater showed themselves around 8:40 am, with the appearance of strombolian bursts and a lava flow from the eastern summit vent.
... [read more]

Sakurajima (Kyushu, Japan): Volcanic Ash Advisory Center Tokyo (VAAC) issued the following report: EXPLODED AT 20210301/0910Z VA CLD UNKNOWN OBS VA DTG:01/0900Z

Suwanose-jima (Ryukyu Islands): Volcanic Ash Advisory Center Tokyo (VAAC) issued the following report: EXPLODED AT 20210301/1756Z OVER FL040 EXTD NE OBS VA DTG:01/1750Z

Popocatépetl (Central Mexico): Volcanic Ash Advisory Center Washington (VAAC) issued the following report: VA EMS HAS DISP

Fuego (Guatemala): Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Washington warned about a volcanic ash plume that rose up to estimated 15000 ft (4600 m) altitude or flight level 150 and is moving at 20 kts in W direction.
The full report is as follows: CONT VA EMS to 15000 ft (4600 m)

Sangay (Ecuador): Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Washington warned about a volcanic ash plume that rose up to estimated 18000 ft (5500 m) altitude or flight level 180 .
The full report is as follows: NEW VA EMS. to 18000 ft (5500 m)

Reventador (Ecuador): Volcanic Ash Advisory Center Washington (VAAC) issued the following report: VA EMS HAS DISP

Sabancaya (Peru): Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Buenos Aires warned about a volcanic ash plume that rose up to estimated 23000 ft (7000 m) altitude or flight level 230 .
The full report is as follows: INTERMITTENT EMISSIONS to 23000 ft (7000 m)

Volcano Activity Summary for 1 Mar 2021:

Residual activity at the New SE crater and bright glow from a vast bush fire near Monte Rinato last evening
Etna volcano update: Bush fire in Valle del Bove raising speculations of new vent
Residual activity at the New SE crater and bright glow from a vast bush fire near Monte Rinato last evening

Weak activity continues last night at the New SE crater, with weak lava flow emission from the eastern end of the main eruptive fissure, but gradually ceased during the night.
Volcanic tremor has again decreased to low levels.
A significant bush fire started during the peak phase of yesterday's activity in the Valle del Bove near or on the southern slope of Monte Rinato. Initially, the appearance of fumes from this area raised speculations of a possible new vent in the Valle del Bove, but soon were discarded.
The cause of the fire remains speculative, but most likely, it was ignited by an exceptionally far-traveled hot volcanic bomb that landed in an area of dense, dry vegetation yesterday. As of this morning, the fire seems to have exhausted itself as no more fumes could be seen, while bright glow was visible last night (see picture).
During the whole time over the past days, intermittent strombolian explosions producing ash plumes rising a few 100 meters have been continuing from the main vent in the central Voragine summit crater. Presumably, mild strombolian activity also continues in Bocca Nuova, while the North-East crater produces dense gas and steam clouds only, but no visible incandescence.

Current tremor signal (image: INGV Catania)
Etna volcano update: Short but violent paroxysm number 7 blankets part of Sicily with black ash
The ash plume of Etna's 8th paroxysm in late Feb 2021 (image: Tom Pfeiffer / VolcanoDiscovery)

The latest lava fountaining episode, or paroxysm, occurred in the morning of Sunday 28 Feb 2021, after a longer interval than the previous six ones. After roughly three and a half day, the awaited number 7 episode of the current series of paroxysms occurred Sunday morning around 9 am local time.
Different from the previous ones, the activity increased from very low levels to strong lava fountains in an extremely very short time. First signs of reactivation of the New SE crater showed themselves around 8:40 am, with the appearance of strombolian bursts and a lava flow from the eastern summit vent.
This activity increased to lava fountaining within approx 30 minutes and had already reached the peak phase at around 9:20 am.
At that time, a tall eruption column rose several kilometers above the volcano's summit and spread into a large umbrella cloud similar to the preceding eruptions.
The lava fountaining phase abruptly ended after 9:40 am and was followed by a series of stronger explosions at the cone before activity dropped almost completely.
The ash cloud drifted east-southeastwards from the volcano and produced heavy ash fall in this sector of the volcano. Particularly affected villages included Zafferana, Milo and Fornazzo, where 1-2 cm black lapilli-sized ash, with fragments up to 1-2 cm quickly covered all surfaces. Members of the VolcanoDiscovery Team observed the eruption from approx. 10 km distance in a location between Fornazzo and Sant'Alfio, at the very edge of the ash fallout. Even there, black scoria of up to 3 cm in diameter were falling like hail during a storm, causing us to seek shelter under a roof.
Video of the ash plume:

VIew of the lava fountain mostly hidden inside the ash and steam column (image: Tom Pfeiffer / VolcanoDiscovery)
Volcanic activity worldwide 28 Feb 2021: Etna volcano, Pacaya, Fuego, Popocatépetl, Ibu, Dukono, Re...
Map of today's active volcanoes
Map of today's active volcanoes
Etna (Sicily, Italy): Volcanic Ash Advisory Center Toulouse (VAAC) issued the following report: ERUPTION AT 20210228/0811Z ERUPTION HAS STOPPED.

Sakurajima (Kyushu, Japan): Volcanic Ash Advisory Center Tokyo (VAAC) issued the following report: EXPLODED AT 20210228/1347Z OVER FL070 EXTD NW OBS VA DTG:28/1340Z

Suwanose-jima (Ryukyu Islands): Volcanic Ash Advisory Center Tokyo (VAAC) issued the following report: EXPLODED AT 20210228/1136Z VA CLD UNKNOWN OBS VA DTG:28/1130Z

Ibu (Halmahera, Indonesia): (27 Feb) Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Darwin warned about a volcanic ash plume that rose up to estimated 6000 ft (1800 m) altitude or flight level 060 .
The full report is as follows: DISCRETE VA ERUPTION TO FL060 MOV SE OBS VA DTG:27/2332Z to 6000 ft (1800 m)

Sinabung (Sumatra, Indonesia): (28 Feb) Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Darwin warned about a volcanic ash plume that rose up to estimated 11000 ft (3400 m) altitude or flight level 110 and is moving at 05 kts in SW direction.
The full report is as follows: DISCRETE VA ERUPTION TO FL110 EXT SW OBS VA DTG:28/0059Z to 11000 ft (3400 m)

Dukono (Halmahera): (28 Feb) Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Darwin warned about a volcanic ash plume that rose up to estimated 7000 ft (2100 m) altitude or flight level 070 and is moving at 10 kts in SE direction.
The full report is as follows: CONTINUOUS VA EMISSIONS TO FL070 EXTD SE OBS VA DTG:28/0000Z to 7000 ft (2100 m)

Popocatépetl (Central Mexico): Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Washington warned about a volcanic ash plume that rose up to estimated 19000 ft (5800 m) altitude or flight level 190 .
The full report is as follows: CONS EM to 19000 ft (5800 m)

Pacaya (Guatemala): Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Washington warned about a volcanic ash plume that rose up to estimated 12000 ft (3700 m) altitude or flight level 120 .
The full report is as follows: NEW VA EMS RPRT BY INSIVUMEH to 12000 ft (3700 m)

Fuego (Guatemala): Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Washington warned about a volcanic ash plume that rose up to estimated 15000 ft (4600 m) altitude or flight level 150 .
The full report is as follows: ONGOING VA EMS to 15000 ft (4600 m)

Sangay (Ecuador): Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Washington warned about a volcanic ash plume that rose up to estimated 19000 ft (5800 m) altitude or flight level 190 .
The full report is as follows: ONGOING VA EMS. to 19000 ft (5800 m)

Reventador (Ecuador): (27 Feb) Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Washington warned about a volcanic ash plume that rose up to estimated 15000 ft (4600 m) altitude or flight level 150 .
The full report is as follows: OCNL VA EM. to 15000 ft (4600 m)

Sabancaya (Peru): Volcanic Ash Advisory Center Buenos Aires (VAAC) issued the following report: INTERMITTENT EMISSIONS

Volcano Activity Summary for 28 Feb 2021:

Satellite image of Etna volcano on 28 Feb 2021
Volcanic activity worldwide 27 Feb 2021: Pacaya volcano, Fuego, Popocatépetl, Dukono, Reventador, S...
Map of today's active volcanoes
Map of today's active volcanoes
Ebeko (Paramushir Island): (26 Feb) Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Tokyo warned about a volcanic ash plume that rose up to estimated 14000 ft (4300 m) altitude or flight level 140 and is moving at 20 kts in NE direction.
The full report is as follows: ERUPTION AT 20210226/1947Z FL140 EXTD E REPORTED OBS VA DTG:26/2030Z to 14000 ft (4300 m)

Suwanose-jima (Ryukyu Islands): (26 Feb) Volcanic Ash Advisory Center Tokyo (VAAC) issued the following report: EXPLODED AT 20210226/2242Z VA CLD UNKNOWN OBS VA DTG:26/2240Z

Dukono (Halmahera): Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Darwin warned about a volcanic ash plume that rose up to estimated 7000 ft (2100 m) altitude or flight level 070 and is moving at 10 kts in SE direction.
The full report is as follows: CONTINUOUS VA EMISSIONS TO FL070 EXTD SE OBS VA DTG:27/1200Z to 7000 ft (2100 m)

Popocatépetl (Central Mexico): Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Washington warned about a volcanic ash plume that rose up to estimated 18500 ft (5600 m) altitude or flight level 185 .
The full report is as follows: ONGOING VA EMS to 18500 ft (5600 m)

Pacaya (Guatemala): Volcanic Ash Advisory Center Washington (VAAC) issued the following report: VA NOT OBSD

Fuego (Guatemala): Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Washington warned about a volcanic ash plume that rose up to estimated 15000 ft (4600 m) altitude or flight level 150 .
The full report is as follows: VA EMS CONT to 15000 ft (4600 m)

Sangay (Ecuador): Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Washington warned about a volcanic ash plume that rose up to estimated 19000 ft (5800 m) altitude or flight level 190 .
The full report is as follows: NEW VA EMS to 19000 ft (5800 m)

Reventador (Ecuador): (27 Feb) Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Washington warned about a volcanic ash plume that rose up to estimated 14000 ft (4300 m) altitude or flight level 140 and is moving at 10 kts in NW direction.
The full report is as follows: VA EMS OBS ON SATELLITE IMAGERY AND WEBCAM to 14000 ft (4300 m)

Sabancaya (Peru): Volcanic Ash Advisory Center Buenos Aires (VAAC) issued the following report: UNABLE TO DETECT
Satellite image of Ebeko volcano on 26 Feb 2021
Volcanic activity worldwide 26 Feb 2021: Etna volcano, Pacaya, Fuego, Popocatépetl, Ibu, Reventador...
Map of today's active volcanoes
Map of today's active volcanoes
Etna (Sicily, Italy): If the amazingly regular current activity continues, a new lava fountaining episode known as paroxysm is likely to occur, and expected by many, during the following night.
Be sure to watch the various Etna webcams or various contributors, almost in real time, on our Facebook group

Ebeko (Paramushir Island): (26 Feb) Volcanic Ash Advisory Center Tokyo (VAAC) issued the following report: ERUPTION AT 20210226/0252Z FL100 EXTD SW REPORTED OBS VA DTG:26/0240Z

Suwanose-jima (Ryukyu Islands): Volcanic Ash Advisory Center Tokyo (VAAC) issued the following report: EXPLODED AT 20210226/1256Z VA CLD UNKNOWN OBS VA DTG:26/1250Z

Raung (East Java): (25 Feb) Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Darwin warned about a volcanic ash plume that rose up to estimated 14000 ft (4300 m) altitude or flight level 140 .
The full report is as follows: VA OBS TO FL130 MOV E AT 25/2230Z OBS VA DTG:25/2329Z to 14000 ft (4300 m)

Ibu (Halmahera, Indonesia): (26 Feb) Volcanic Ash Advisory Center Darwin (VAAC) issued the following report: VA REPORTED TO FL070 AT 25/2314Z.

Sinabung (Sumatra, Indonesia): The activity at the volcano continues to be very high. The lava dome is growing, producing incandescent avalanches and small to moderate pyroclastic flows from time to time.
In addition, vigorous vulcanian explosions occur intermittently, such as a strong one yesterday, the produced a towering ash column rising several kilometers. Part of the eruption column collapsed into a dangerous hot avalanche (pyroclastic flow), as seen on images posted in our facebook volcano news group.

Popocatépetl (Central Mexico): Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Washington warned about a volcanic ash plume that rose up to estimated 18500 ft (5600 m) altitude or flight level 185 .
The full report is as follows: NEW VA EMS to 18500 ft (5600 m)

Pacaya (Guatemala): (26 Feb) Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Washington warned about a volcanic ash plume that rose up to estimated 11000 ft (3400 m) altitude or flight level 110 .
The full report is as follows: LGT VA CLD OBS. to 11000 ft (3400 m)

Fuego (Guatemala): Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Washington warned about a volcanic ash plume that rose up to estimated 15000 ft (4600 m) altitude or flight level 150 .
The full report is as follows: OINGOING VA EMS to 15000 ft (4600 m)

Sangay (Ecuador): Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Washington warned about a volcanic ash plume that rose up to estimated 20000 ft (6100 m) altitude or flight level 200 .
The full report is as follows: EMS OBSD to 20000 ft (6100 m)

Reventador (Ecuador): (26 Feb) Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Washington warned about a volcanic ash plume that rose up to estimated 14000 ft (4300 m) altitude or flight level 140 .
The full report is as follows: RPRTS OF VA EM to 14000 ft (4300 m)

Sabancaya (Peru): Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Buenos Aires warned about a volcanic ash plume that rose up to estimated 27000 ft (8200 m) altitude or flight level 270 and is moving at 10 kts in W direction.
The full report is as follows: INTERMITTENT EMISSIONS to 27000 ft (8200 m)

Volcano Activity Summary for 26 Feb 2021:

Lava fountain during Etna's paroxysm during 24-25 Feb night (image: Domenico Mazzaglia / facebook)
Sinabung volcano (Sumatra, Indonesia) activity update: growing lava dome, incandescent avalanches, pyroclastic flows, vulcanian explosions
Eruption of Mt. Sinabung volcano (Sumatra, Indonesia) yesterday (image: https://www.facebook.com/Moisturetraffic)

The activity at the volcano continues to be very high. The lava dome is growing, producing incandescent avalanches and small to moderate pyroclastic flows from time to time.
In addition, vigorous vulcanian explosions occur intermittently, such as a strong one yesterday, the produced a towering ash column rising several kilometers. Part of the eruption column collapsed into a dangerous hot avalanche (pyroclastic flow), as seen on images posted in our facebook volcano news group.

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