Volcanic activity worldwide 11 May 2021: Pacaya volcano, Fuego, Semeru, Dukono, Piton de la Fournais...

Suwanose-jima (Ryukyu Islands): Volcanic Ash Advisory Center Tokyo (VAAC) issued the following report: EXPLODED AT 20210511/1949Z VA CLD UNKNOWN OBS VA DTG:11/1940Z

Sinabung (Sumatra, Indonesia): (11 May) Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Darwin 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: VA TO FL120 MOV E. to 12000 ft (3700 m)

Semeru (East Java, Indonesia): (11 May) 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: DISCRETE VA ERUPTION TO FL140 MOV MW OBS VA DTG:11/0121Z to 14000 ft (4300 m)

Dukono (Halmahera): Volcanic Ash Advisory Center Darwin (VAAC) issued the following report: CONTINUOUS VA EMISSIONS TO FL080 EXTD NE EST VA DTG:11/1600Z

Semisopochnoi (United States, Aleutian Islands): The Alaska Volcano Observatory (AVO) reported that the alert level for the volcano was lowered to "yellow", as no ash emissions/explosions have been recorded since 26 April.
Satellite images of the volcano confirmed no recent ash deposits or elevated surface temperatures and only steam emissions were observed within the North Cerberus crater.
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Sulfur dioxide (SO2) emissions, detected on 1 and 5 May, indicate continuing seismic unrest at the volcano.


Pacaya (Guatemala): Volcanic Ash Advisory Center Washington (VAAC) issued the following report: VA NOT OBS IN SAT.

Fuego (Guatemala): Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Washington warned about a volcanic ash plume that rose up to estimated 17000 ft (5200 m) altitude or flight level 170 .
The full report is as follows: FRQ VA EMS. to 17000 ft (5200 m)

Sangay (Ecuador): The effusive-explosive eruption of the volcano continues.
Frequent explosions of small to moderate size continue to erupt from the summit crater producing ash plumes that reached up to 23,000 ft (7,000 m) altitude. Volcanic ash is dispersed toward the SW.
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The glowing lava, visible at night, continues to keep the flow active onto the southeastern slope at moderate rate.


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 20 kts in SE direction.
The full report is as follows: PUFF EMISSIONS to 24000 ft (7300 m)

Nevados de Chillán (Central Chile): Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Buenos Aires 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: PUFF EMISSIONS to 14000 ft (4300 m)

Piton de la Fournaise (La Réunion): The eruption that had begun more than a month ago (in the evening of 9 April) still continues with moderate lava effusion, making this eruption one of the longer-lasting ones at the volcano in recent years.
Magma erupts from the two vents on the original eruptive fissure, where small cones have formed. The latest measurements show that the larger of the two cones now has a width of 226 m and a height of around 35 m. Mild strombolian activity and spattering is occurring at the cones having open craters, with some lava ejected to the immediate surroundings, but most of the lava is diverted directly into underground tubes and flows to the active surface flows with fronts at about 5-6 km distance downslope.
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The most advanced flow front continues its slow progression in the Grandes Pentes slope and is currently at an altitude of 1200 m The last precise contour of the flow, deduced from the consistency data of the InSAR acquisitions, dates back to May 7, the flow was then located at an altitude of 1200 m, about 500 m from the Piton Fréri (formed during the eruption in October 2019, located at an altitude of about 1000 m).