Schlagwort: volcano

The actively growing lava dome in comparison to the 1979 lava dome (image: UWI-SRC)

The effusive eruption of the volcano continues accompanied by actively growing lava dome.

On 16 January the volcanologists of the University of the West Indies Seismic Research Centre (UWI-SRC) did a rock sampling from the western part of the growing lava dome.
During the field sampling a thermal images were taken to measure a current surface temperature approx. 590 °C as hot rising magma pushes its way up to the surface. Glow identified in satellite data suggesting rise of the magma. The aerial survey will be used to create a detailed model of the dome which will help map the growth and volume of the lava dome in the future.

The actively extruded lava dome area located on the edge of the old lava dome from 1979 continues to grow in lateral (east to west) direction. The height and volume of the lava dome is unknown and was not reported yet, but from available imagery seems to be 3/4 the height of the 1979 dome.
The most active degassing area was observed between the pre-existing 1979 dome and the actively growing dome.
An extensive area of burnt vegetation was observed in the western section of the crater floor extending outwards from the dome.

Persons living in areas close to the volcano should expect strong sulfur dioxide (SO2) emissions for several days to weeks, depending on changes in wind direction. Neither has an evacuation order been issued yet.

Source: University of the West Indies Seismic Research Centre volcano activity update 18 January 2021

Thermal image of the growing dome has reached values approx. 590 °C (image: UWI-SRC)

Map of today’s active volcanoes

Etna (Sicily, Italy): This morning, the ongoing eruptive activity at the volcano changed: a lava flow started to emerge from a vent on the eastern summit of the New SE crater and quickly descended to its base.
At the same time, the strombolian activity from the New SE crater’s main vent and, less frequently, from the Voragine central crater, decreased a bit (but continue). Both had been quite impressive during the past days, especially the activity at the New SE crater. While fluctuating and at times being intense, it had not intensified to another paroxysm (lava fountaining episode) such as on 13-14, 21 and 22 Dec last month, something that had been more or less expected.
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Volcanic tremor is currently moderate to high, but not showing significant variations compared to previous days.

Klyuchevskoy (Kamchatka): (17 Jan) Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Tokyo warned about a volcanic ash plume that rose up to estimated 20000 ft (6100 m) altitude or flight level 200 and is moving at 30 kts in NE direction.
The full report is as follows: VA AT 20210117/0120Z FL200 EXTD NE OBS VA DTG:17/0120Z to 20000 ft (6100 m)

Sakurajima (Kyushu, Japan): Volcanic Ash Advisory Center Tokyo (VAAC) issued the following report: EXPLODED AT 20210117/1345Z OVER FL070 EXTD SE OBS VA DTG:17/1340Z

Semeru (East Java, Indonesia): (16 Jan) The volcano had a significant eruptive phase this afternoon. Starting at around 17:24 local time, a pyroclastic flow was observed that traveled a distance of approx. 4500 m, according to Indonesia’s Civil Defense Agency BNPB.
The hot avalanche was likely caused by collapses of parts of the lava dome and/or upper parts of the lava flow on the steep southern slope of the volcano. Associated ash plumes rose to an altitude of 5500 m above sea level.
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The volcanologists at the observatory registered a corresponding seismic signal with up to 22 mm amplitude that lasted for the considerable long period of 4287 seconds (approx. 1 hour 20 mins).

Telah terjadi Awan Panas Guguran (APG) Gunung Semeru dengan jarak luncur kurang lebih 4,5 KM pada Sabtu (16/1) pkl 17.24 WIB. #Semeru #InfoBencana #BNPBIndonesia pic.twitter.com/H6ndVbLU1w

— BNPB Indonesia (@BNPB_Indonesia) January 16, 2021

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: VA OBS 17/1436Z to 19000 ft (5800 m)

Sangay (Ecuador): Volcanic Ash Advisory Center Washington (VAAC) issued the following report: VA NOT OBS

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 EM 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 24000 ft (7300 m) altitude or flight level 240 and is moving at 10 kts in NW direction.
The full report is as follows: INTERMITTENT PULSES OF VA to 24000 ft (7300 m)

Nevados de Chillán (Central Chile): Volcanic Ash Advisory Center Buenos Aires (VAAC) issued the following report: WX EMISSION

Volcano Activity Summary for 17 Jan 2021:

Lava flow from Etna’s New SE crater this morning seen on the INGV thermal webcam