Volcanic activity worldwide 28 Nov 2022: Etna volcano, Fuego, Popocatépetl, Semeru, Reventador, Mau…

Map of today’s active volcanoes

Etna (Sicily, Italy): (28 Nov) The Istituto Nazionale di Geofisica e Vulcanologia (INGV) reported that a new eruptive fissure opened at the volcano yesterday.
The new fissure vent is located on the northeastern flank of the SE crater at an altitude of approx. 2800 meters. The vent has been producing a small lava flow descending down the Valle del Leone valley.
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Etna itself is currently snow-covered and contact with the lava flow may likely cause an explosion of steam and water, i.e., steam driven only, caused by overheated water flashing to steam.
Prior to the eruption, a typical rise of volcanic tremor to high values has been detected, indicating moving magma upwards through the volcanic conduits. Consequently, it decreased again to medium levels and it still continues like that at the time of this update.

Semeru (East Java, Indonesia): (27 Nov) Volcanic Ash Advisory Center Darwin (VAAC) issued the following report: VONA FOR ERUPTION TO FL140 MOV N AT 27/2256Z

Maunaloa (Big Island, Hawai’i): The volcanic activity changed significantly a few hours ago by extending to the northeastern flank: new batches of magma continued to rise from inside the volcano, forming new internal sheet-like pathways known as dikes, that eventually broke through the surface as eruptive fissures on the upper NE flank.
These new fissures started to feed several new lava flows upslope of the Mauna Loa Weather Observatory.
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The propagation of magma inside the volcano from the SW and central area toward the NE is also reflected by the location of recent earthquake epicenters clustered along a SW-NE extending line, corresponding to the internal location of dikes. See also our interactive earthquake map of recent quakes under Maunaloa.
The fissure vents are located at high elevations within Hawai‘i Volcanoes National Park.

…28 Nov:
The eruption continues at the summit of Mauna Loa where a lava lake seems to form inside the vast summit caldera. According to the latest update of the volcano observatory, „All vents remain restricted to the summit area. However, lava flows in the summit region are visible from Kona. There is currently no indication of any migration of the eruption into a rift zone.“
It should be added that the situation can change very quickly. Seismic activity under the volcano’s summit region, and more precisely under the upper southwestern rift zone, remains significant. This suggests the possibility that new dikes form underground that eventually could breach the flanks of the volcano, thus evolving the current summit eruption to a flank eruption.
…28 Nov:
A new eruption started at Maunaloa volcano in the evening of 27 November at about 11:30 PM local time yesterday.
A new lava effusion began to ooze out within Moku‘āweoweo summit caldera. From available webcams and thermal images, it seems to open a new chain of vents producing small lava fountains (so-called „curtain of fire“), where they form a spreading field of lava slowly covering the crater floor.
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Therefore, a decision has been made by authorities and the HVO volcano observatory to rise Volcanic Alert Level to „Red“.
Winds may carry volcanic gas and possibly fine ash and typical Hawaiian-type phenomena Pele’s hair downwind.

Popocatépetl (Central Mexico): 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: VA EMS OBS to 24000 ft (7300 m)

Fuego (Guatemala): (28 Nov) 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 LGT 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 and is moving at 5 kts in E direction.
The full report is as follows: CONS VA EMS OBSD to 20000 ft (6100 m)

Reventador (Ecuador): 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: ONGOING VA EMS to 17000 ft (5200 m)

Sabancaya (Peru): Volcanic Ash Advisory Center Buenos Aires (VAAC) issued the following report: UNABLE TO DETECT

Volcano Activity Summary for 28 Nov 2022:

Vividly glowing new lava flow on the snow on the SE crater of Etna (image: @etnawalk/twitter)