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Earth of fire

Actualité volcanique, Articles de fond sur étude de volcan, tectonique, récits et photos de voyage

Publié le par Bernard Duyck
Publié dans : #volcanic activity
Sangay - plume of ash and gas on 08.16.2022 / 07:14 - Doc. IGEPN - one click to enlarge

Sangay - plume of ash and gas on 08.16.2022 / 07:14 - Doc. IGEPN - one click to enlarge

Activity levels in Sangay, Equateur remain high, superficially and internally. The surface trend is up.
Seismicity is characterized by: Explosion (EXP) 20 - Long period (LP) 60 - Emission quake (TREMI) 30
During the morning today, several continuous emissions of gas, steam and ash with heights greater than 2000 meters above the level of the crater, with a direction mainly to the west. The Washington VAAC published 3 ash emission records at 1770 meters above crater level with a westerly direction and one emission at 2060 meters above crater level in a southwest direction.

The FIRMS system records 22 thermal alerts and MIROVA 1 moderate thermal alert, in the last 24 hours.

The Mounts system reports 130.7 tons of SO2, with data from 2022-08-15 at 5:57 p.m. TL.

 

At 09:00 on 16.08, thanks to reports from the Network of Volcanic Observers of Ecuador (ROVE), the fall of ash is confirmed in Pancun Ichubamba, province of Chimborazo. According to satellite images, the ash cloud may continue to generate ashfall in the same province. This phenomenon has been frequent throughout the current eruptive period. It is recommended to take the appropriate measures and obtain information from official sources Emission of ash to the west. Source: GOES-16

 

Source: IGEPN

Sangay - dispersion of ashes to the west - GOES-16 ABI image of 16.08.2022 / 13:00 UTC - Doc. NOAA CIMES

Sangay - dispersion of ashes to the west - GOES-16 ABI image of 16.08.2022 / 13:00 UTC - Doc. NOAA CIMES

The Meradalur eruption site on Iceland's Reykjanes peninsula will be closed on August 17 due to weather conditions. The closure was announced by Suðurnes Police in a press release.

The Icelandic Met Office has issued a yellow weather alert for South Iceland, Faxafloi - South West Iceland and Central Highlands - Uninhabited part of Iceland, where considerable rainfall and high winds are expected . Wind gusts in the area could reach speeds of 30 meters per second. Milder conditions are expected again on Thursday.

Iceland - Yellow weather warning for this 17.08.2022 - Doc. IMO

 

Meradalur - Langholl webcam 16.08.2022 / 07:33 / RUV / via Volcano Chaser

Meradalur - Langholl webcam 16.08.2022 / 07:33 / RUV / via Volcano Chaser

The lava flow has decreased. The lava flow rate during the eruption has decreased significantly since its start on August 3, according to the latest measurements released by the Institute of Earth Sciences at the University of Iceland. While the flow measured 11 cubic meters per second between August 4 and 13, the average flow between Saturday and Monday was much lower, 3 to 4 cubic meters per second, even dropping to 2.0 m³/s on August 16, according to the University.

"It is impossible to say at this stage if the end of the eruption is near or if it is only a temporary low point of the eruption ", indicates an opinion of the Institute.

 

It is very dangerous to be on the old lava, because it comes out with great force when the old crust breaks. The image shows a cross section north and south of Merardalur and how the lava reacts. To the south a large jet of lava has come out and to the north the lava has extended several meters, so there is a risk that previously molten lava below could spew out forcefully as the crust breaks.

 

Sources: IMO, Univ. Iceland, Iceland Review

Meradalur is - lava profiles and reasons not to walk on lava - Doc. 16.08.2022 Eldfjallafræði og náttúruvárhópur Háskóla Íslands - one click to enlarge the images
Meradalur is - lava profiles and reasons not to walk on lava - Doc. 16.08.2022 Eldfjallafræði og náttúruvárhópur Háskóla Íslands - one click to enlarge the images

Meradalur is - lava profiles and reasons not to walk on lava - Doc. 16.08.2022 Eldfjallafræði og náttúruvárhópur Háskóla Íslands - one click to enlarge the images

The eruptive activity of Sabancaya remained at moderate levels this week, from August 8 to 14, 2022, with 25 daily explosions, accompanied by plumes of gas and ash reaching 2,400 m. above the top of the volcano.

The IGP detected 366 earthquakes of volcanic origin associated with the circulation of magmatic fluids during this week, as well as VT earthquakes, linked to the fracturing of rocks.

No significant deformation anomaly; Seven thermal anomalies, from max. 22 MW, have been identified, associated with a lava dome in the crater.

The volcanic alert remains at naranja, with a non-accessible zone of 12 km radius around the crater.

 

Source: I.G.Peru

Sabancaya - weekly bulletin from 08 to 14.08.2022 / I.G.P.

Sabancaya - weekly bulletin from 08 to 14.08.2022 / I.G.P.

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