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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
Soufriere de St Vincent - old and new domes in the crater - photo 05.01.2021 / Professor Richard Robertson, UWI-SRC

Soufriere de St Vincent - old and new domes in the crater - photo 05.01.2021 / Professor Richard Robertson, UWI-SRC

The team from the Seismic Research Center, University of the West Indies, St. Augustine Campus (UWI-SRC) led by Professor Richard Robertson made a reconnaissance on the edge of the crater of La Soufrière, to take photos and videos that will allow estimation of the volume of material effused and the growth of the new dome.

Based on observations, the dome is slowly expanding. The vapor emitted is visible from the Belmont Observatory

An aerial reconnaissance must be carried out, according to the weather, on January 6.

The National Emergency Management Organization (NEMO) held meetings with different communities, likely to be impacted in the event of a more violent explosive eruption, to review contingency plans.

The alert level remains at 2 / orange

 

Source: Bulletin de La Soufrière # 8 - 05,01,2021

Soufrière de St Vincent - the new growing dome on 05.01.2021- UWI -SRC field reconnaissance

Soufrière de St Vincent - the new growing dome on 05.01.2021- UWI -SRC field reconnaissance

Soufriere de St Vincent - degassing of the dome could cause strong sulfur odors - UWI field reconnaissance -SRC / 05.01.2021

Soufriere de St Vincent - degassing of the dome could cause strong sulfur odors - UWI field reconnaissance -SRC / 05.01.2021

The volcanic activity of Sabancaya remained at a moderate level between December 28 and January 3, 2021, with an average of 35 daily explosions; they are accompanied by plumes of ash reaching 3,000 meters above the summit.

At the seismological level, I.G. Peru recorded 1,500 earthquakes of volcanic origin associated with the internal circulation of magmatic fluids. Volcano-tectonic earthquakes, from M 2.2 to 2.6, were located to the northeast of the volcano.

No thermal anomaly was identified.

A second lava dome has been reported in the crater of the volcano.

Forecasts for January 7-9 : precipitations could cause lahars in the Sabancaya drainages.

The volcanic alert remains in Naranja, with an inaccessible area of ​​12 km radius around the crater.

 

The IGP recorded the descent of lahars in the Ubinas on December 31 and January 1.

Sources: I.G. Peru & Cenvul

Sabancaya - summary table of activity between 28.12.2020 and 03.01.2021 - Doc. I.G. Peru

Sabancaya - summary table of activity between 28.12.2020 and 03.01.2021 - Doc. I.G. Peru

At Merapi, on Java, the PVMBG notes this January 7 between 00 - 12h WIB:

- 1 earthquake, accompanying a pyroclastic flow, with an amplitude of 28 mm and an earthquake duration of 155 seconds. The flow was only partially visible, because between 6 and 12 a.m. WIB, the volcano was covered by fog.

- 46 collapse / avalanche earthquakes

- 56 blast / emission earthquakes

- 120 multiphase hybrid earthquakes

- 21 shallow volcanic earthquakes

- 2 distant tectonic earthquakes.

 

The activity level remains at 3 / siaga

 

Sources: PVMBG, Magma Indonesia

Merapi - Pyroclastic flow of 07.01.2021 / 11.56 a.m. WIB - Doc. Magma Indonesia / PVMBG

Merapi - Pyroclastic flow of 07.01.2021 / 11.56 a.m. WIB - Doc. Magma Indonesia / PVMBG

The National Institute of Geophysics and Vulcanology, Etna Observatory, communicates that from 09:05 hours UTC on January 6, 2021, a gradual intensification of the explosive strombolian activity at the eastern mouth of the SE Crater has been observed. This activity produces abundant dark ash which disperses eastward.

In addition, almost continuous Strombolian explosions are observed at Voragine. The little cone, present since September 2019, is growing.

Regarding the other craters, the activity remains unchanged from the previous press release.

No significant variation in tremor, strain and infrasonic activity is reported

 

Sources : INGV OE et Boris Behncke

Etna SEC - ash emission on 06.01.2021 in the morning - photo INGVvulcani

Etna SEC - ash emission on 06.01.2021 in the morning - photo INGVvulcani

This January 6, at 10:14 am local, the seismic stations of the OVDAS recorded a volcano-tectonic earthquake of ML 3.0 at a depth of 4.1 km. under the Hudson Caldera.

The alert level is maintained at amarilla.

 

Source: Sernageomin

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