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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
Taal - 07/01/2021 / 3:17 p.m. - plume of the phreatomagmatic eruption - photo Phivolcs

Taal - 07/01/2021 / 3:17 p.m. - plume of the phreatomagmatic eruption - photo Phivolcs

Taal - summary table of activity on 02.07.2021 - Doc. Phivolcs

Taal - summary table of activity on 02.07.2021 - Doc. Phivolcs

Update on Taal activity by the Phivolcs on July 1, 2021/11 p.m.


Alert Level 3 (magmatic unrest) was triggered over Taal volcano at 3:37 p.m. today, after a phreatomagmatic eruption from the main crater occurred at 3:16 p.m. The eruption lasted for five minutes according to visual monitors and generated a dark plume about a kilometer high. The event was recorded halfway through as a low-frequency blast earthquake, but was not preceded by seismic precursors or ground deformation. However, abnormally high SO2 volcanic gas emissions preceded the eruption, averaging 14,241 tonnes / day and 13,287 tonnes / day on June 28 and July 1, 2021, respectively. A marked increase in volcanic gas surges also began on June 28, 2021 which generated plumes that rose about three kilometers above the island of the Taal volcano.

Since the phreatomagmatic event earlier this afternoon, four short phreatomagmatic bursts have occurred that lasted no more than two minutes each and produced short plumes rising 200 meters above the main crater lake. . These events occurred at 6:26 p.m., 7:21 p.m., 7:41 p.m. and 8:20 p.m. The ascent of the main crater lake that started at 8:07 p.m. this evening is underway.

Taal's Level 3 alert status means that there is magmatic extrusion in progress in the main crater which may lead to more subsequent explosions. PHIVOLCS strongly recommends that the island of Taal Volcano and the high risk barangays of Bilibinwang and Banyaga, Agoncillo and Boso-boso, Gulod and east of Bugaan East, Laurel, Batangas province be evacuated due to possible risks of currents pyroclastic density and volcanic tsunami if stronger eruptions subsequently occur.

The public is reminded that the entire island of the Taal Volcano is a Permanent Danger Zone (PDZ) and that entry to the island as well as the high-risk barangays of Agoncillo and Laurel must be prohibited. . All activities on Taal Lake should not be permitted at this time. Communities around the shores of Lake Taal are advised to remain vigilant, take precautionary measures against airborne ash and vogs, and calmly prepare for a possible evacuation if the unrest escalates.

 

Source: Phivolcs

Videos of the eruptive plume on:

- facebook: https://www.facebook.com/PHIVOLCS/videos/187254863355936

- twitter: https://twitter.com/i/status/1410574212134178823

Etna SEC- the lava fountains at 07/02/2021 / 12:59 am and 1:59 am loc. -  webcam LAVE
Etna SEC- the lava fountains at 07/02/2021 / 12:59 am and 1:59 am loc. -  webcam LAVE

Etna SEC- the lava fountains at 07/02/2021 / 12:59 am and 1:59 am loc. - webcam LAVE

On 01.07.2021 from 22:40 UTC, the resumption of Strombolian activity is observed at the level of the south-eastern crater of Etna.
At 22.40 UTC the amplitude of the volcanic tremor is high. The last tremor location, at 9.45pm UTC, is near the southeast crater at a depth of approximately 3.0 km asl.
From 22.50 UTC, Strombolian activity changes to the lava fountain stage. According to the forecast model, the eruptive cloud produced by the current activity disperses in the WNW direction.
In a report at 11:37 p.m., the INGV reports that the SEC lava fountain activity continues. In addition, there is an overflow of lava in the SW direction. Based on the forecast model, the eruptive cloud produced by the current activity disperses in the ESE direction.


On 02.07.2021, from 00.50 UTC, the lava fountain in the southeast crater ceased, while weak Strombolian activity persists. As for the lava overflow, there is still
fed in the direction of SW.

 

Source: INGV OE

Etna - variations of the tremor at 02.07.2021 / 07h - Doc. INGV OE

Etna - variations of the tremor at 02.07.2021 / 07h - Doc. INGV OE

An eruptive episode occurred at Sinabung on Thursday, July 1, 2021 at 11:51 a.m. WIB, accompanied by a gray and thick ash plume at a height of ± 800 m above the summit (± 3260 m above the level of the sea), drifting southwest and west. This eruption was recorded on a seismograph with a maximum amplitude of 101 mm and a duration of 88 seconds.

The activity level remains at 3 / siaga. Residents and visitors / tourists are requested not to carry out activities in the resettled villages, as well as within a radius of 3 km from the summit of G. Sinabung, 5 km of sector radius for the south-eastern sector, and 4 km for the east-north sector.

 

Source: PVMBG & Magma Indonesia

Sinabung - 07/01/2021 / 11:53 am WIB - photo PVMBG - Magma Indonesia

Sinabung - 07/01/2021 / 11:53 am WIB - photo PVMBG - Magma Indonesia

In Fagradalsfjall, despite a drop in the volcanic tremor on July 01 afternoon, coupled with low activity in the crater, it picked up nicely overnight.

A possible collapse at the level of the crater is responsible for an ash plume around 3:44 a.m. on July 2.

 

Sources: Veðurstofa Íslands & webcams RUV and mbls

Fagradalsfjall - fall of the tremor on 01.07.2021 - Doc. Veðurstofa Íslands

Fagradalsfjall - fall of the tremor on 01.07.2021 - Doc. Veðurstofa Íslands

Fagradalsfjall - stable lava flow on the night of 01.07.2021 - RUV webcam

Fagradalsfjall - stable lava flow on the night of 01.07.2021 - RUV webcam

Fagradalsfjall - 02.07.2021 / 01:10 - webcam langihryggur NV

Fagradalsfjall - 02.07.2021 / 01:10 - webcam langihryggur NV

Fagradalsfjall - 02.07.2021 / 03:44 - probable collapse at the active crater responsible for the ash emission - webcam mbls / Natthaga valley

Fagradalsfjall - 02.07.2021 / 03:44 - probable collapse at the active crater responsible for the ash emission - webcam mbls / Natthaga valley

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