Volcanic activity worldwide 20 Sep 2021: Fuego volcano, Semeru, Reventador, Sangay, La Palma, Sabanc…

Map of today’s active volcanoes

La Palma (Canary Islands (Spain)): Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Toulouse warned about a volcanic ash plume that rose up to estimated 15000 ft (4600 m) altitude or flight level 150 and is moving at 10 kts in S direction.
The full report is as follows: ERUPTION AT 20210919/1410Z ASH EMISSION STILL ONGOING to 15000 ft (4600 m)
…20 Sep:
The lava flows continue to advance towards the coast. According to the latest forecasts, they might reach the sea shore by around 8 p.m. local time, most likely in the area of Playa Nueva in Los Guirres.
Maritime authorities have already established an exclusion zone in the sea, stretching from Punta del Pozo (Puerto Naos) in the south to Las Viñas beach (Tazacorte) in the north, and half a nautical wide. On land, security forces are present to prevent unauthorized access.
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Volcanic tremor as a measure of lava supply rate remains relatively stable and overall high. All suggests that the eruption is going to last for a while, possibly weeks or even months.
The SO2 plume from the eruption in the meantime is visible east of the island over the Atlantic ocean:

…20 Sep:
An impressive time-lapse video has been posted by the astrophysical observatory Instituto de Astrofísica de Canarias of the first day of the La Cumbre Vieja volcano’s eruption.
Lava jets surpassed up to a few 100 m height.
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Stunning time-lapse video of eruption seen from astrophysical observatory (source:@sky_live_tv/twitter)

…20 Sep:
INVOLCAN published a nice animated map showing the historic eruptions of La Palma:

Quick summary of recent volcanic eruptions on La Palma, Canary Islands#LaPalma #sismo #pevolca #IGNSpain #CumbreVieja #volcano #vigilanciaLaPalma pic.twitter.com/QJebLikXjY

— Noche de Volcanes (@nochedevolcanes) September 18, 2021

…20 Sep:
The Volcanological Institute of Canary Islands (INVOLCAN) revealed the first measurements of SO2 concentrations in the atmosphere and a lava flow discharge rate of the current eruption at the La Cumbre Vieja volcano that began yesterday.
Sulfur dioxide emissions
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First estimated amount of sulfur dioxide (SO2) emissions occurring in the plume reached to a 6000-9000 tonnes/day provided by the AEMET.
Lava flow discharge rate

…20 Sep:
The scenario of new eruptive fissures opening might be not that unlikely at all. The surface continues to inflate, which is a sign that more magma is being stored underground that (can erupt) erupts at the surface – the existing paths are not large enough. The volcano might choose to either enlarge them or create new ones.
…20 Sep:
The eruptio in the Cabeza de Vaca area, in El Paso municipality, continues from at least 8 active vents along the two eruptive fissures that opened yesterday at about 200 m distance from each other. The lava has already entered the municipality of Los LLanos de Aridane when crossing the LP2 highway, and is directed towards the centers of La Bombilla and Puerto Naos on the coast.
A sizeable new cinder cone, typically described as “new volcano”, has already formed around the main vent. Lava fountains continue to shoot many tens of meters into the air from the most active vents.
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Lava flows continued to advance, at an average speed of 700 m per hour, towards the west coast. The flows have already destroyed around a hundred homes in the municipality of El Paso, according to the first calculations of the Civil Protection. Fortunately, there has only been damage to property but not to people as the advance of the lava is slow enough to allow a managed evacuation and escape.
Some 5,000 people have been evacuated from the municipalities of El Paso, Los Llanos de Aridane and Tazacorte so far. An exclusion zone of 2 km radius around the eruption site has been emplaced, in order to protect people from gasses and projectiles.

Suwanose-jima (Ryukyu Islands): Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Tokyo warned about a volcanic ash plume that rose up to estimated 10000 ft (3000 m) altitude or flight level 100 and is moving at 10 kts in N direction.
The full report is as follows: VA EMISSIONS CONTINUING OBS VA DTG:20/1720Z to 10000 ft (3000 m)

Semeru (East Java, Indonesia): (19 Sep) Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Darwin warned about a volcanic ash plume that rose up to estimated 13000 ft (4000 m) altitude or flight level 130 .
The full report is as follows: VA TO FL130 OBS FM GND AT 19/2226 MOV SW OBS VA DTG:19/2244Z to 13000 ft (4000 m)

Semisopochnoi (United States, Aleutian Islands): Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Tokyo warned about a volcanic ash plume that rose up to estimated 15000 ft (4600 m) altitude or flight level 150 and is moving at 15 kts in N direction.
The full report is as follows: LOW LEVEL ERUPTIONS CONTINUE. to 15000 ft (4600 m)
…20 Sep:
The eruption has intensified and the alert status of the volcano was raised to the highest level RED. Ash emissions from the volcano have increased in frequency and intensity, and can be seen on satellite images rising above the weather clouds.
The latest estimate was that the ash plume reached an altitude of 15,000 ft. above sea level, extending approximately 60 miles (100 km) to the southeast through 05:00 UTC this morning, the Alaska Volcano Observatory (AVO) reported:
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„Explosions have been observed throughout the day and increased sulfur dioxide gas emissions have been observed in satellite data this afternoon. These observations represent an increase in eruptive activity and Aviation Color Code and Volcano Alert level are being increased to RED/WARNING.

Fuego (Guatemala): (20 Sep) Volcanic Ash Advisory Center Washington (VAAC) issued the following report: VA NO LONGER DETECTABLE?

Sangay (Ecuador): Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Washington warned about a volcanic ash plume that rose up to estimated 24000 ft (7300 m) altitude or flight level 240 .
The full report is as follows: INCREASING ACTIVITY to 24000 ft (7300 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 and is moving at 30 kts in W direction.
The full report is as follows: OCNL VA CLDS OBSD 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 23000 ft (7000 m) altitude or flight level 230 and is moving at 10 kts in SE direction.
The full report is as follows: continuous ash emissions to 23000 ft (7000 m)

Volcano Activity Summary for 20 Sep 2021:

Lava flows from the eruption of La Palma in the area downslope of El Paraíso (image: El Mundo live stream)