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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
La Palma / Cumbre Vieja - large plume of gas and ash this 14.11.2021 - photo IGME

La Palma / Cumbre Vieja - large plume of gas and ash this 14.11.2021 - photo IGME

During the day of November 14, the plumes of gas and ash from Cumbre Vieja were significant.

Sunday evening, the eruptive plume presented a large number of volcanic lightning, produced by the friction of the particles ejected from the volcano which polarizes them, separating the positive and negative charges, causing a potential difference which produces the electric discharge.

La Palma / cumbre Vieja - image Sentinel-2 bands 12, 11,4 from 14.11.2021 - several arms of flows in the direction of the ocean. - one click to enlarge

La Palma / cumbre Vieja - image Sentinel-2 bands 12, 11,4 from 14.11.2021 - several arms of flows in the direction of the ocean. - one click to enlarge

According to information disseminated by the management of PEVOLCA, the contribution of lava flows crosses the existing flows in a single channel which sometimes forks, especially in the lower zone, and reaches the sea at three points.

Sulfur dioxide emissions, associated with the volcanic plume, are lower than in previous days but remain high.

La Palma / Cumbre Vieja - RSAM at 11.14.2021 / 8:35 p.m. - doc. IGN

La Palma / Cumbre Vieja - RSAM at 11.14.2021 / 8:35 p.m. - doc. IGN

La Palma / Cumbre Vieja - Earthquakes on 15.11.2021 - Doc. IGN

La Palma / Cumbre Vieja - Earthquakes on 15.11.2021 - Doc. IGN

La Palma / Cumbre vieja - Castings on 13.11.2021 / 6.44 p.m. - Doc. Copernicus EMSR

La Palma / Cumbre vieja - Castings on 13.11.2021 / 6.44 p.m. - Doc. Copernicus EMSR

Regarding seismicity, the level is maintained at depths greater than 20 kilometers, but the intermediate level continues to be low and located in the same areas.

Decreasing levels of sulfur dioxide emitted and earthquakes at intermediate depths seem to indicate that the volcano continues to show signs of exhaustion. This morning, a 4.4 earthquake shook the island again

The area affected by the volcanic eruption reached 1024 hectares, or +5.5 ha in ~ 36h, a growth corresponding to the lava delta. The maximum width between the flows remains at 3,100 meters,

 

Sources: IGN, IGME, DSN, Pevolca, Copernicus

Semeru - seismicity at 14.11.2021 - Doc. Magma Indonesia

Semeru - seismicity at 14.11.2021 - Doc. Magma Indonesia

At Semeru, a white-gray plume is observed at an altitude of 300-600 meters from the summit.
86 volcanic earthquakes associated with eruptions and 10 with gas and ash gusts are reported by the PVMBG.


The activity level is at 2 / waspada.
The public / visitors / tourists are not active within a radius of 1 km from the crater / peak of Mount Semeru and at a distance of 5 km towards the opening of the crater in the south-east-south sector, while being aware of the Hot cloud avalanches, lava avalanches and lahars along the river / valley which originates at the top of Mount Semeru.

 

Sources: PVMBG & Magma Indonesia

Kilauea - Sentinel-2 bands 12,11,8A & Modis thermal volcanic activity - doc.Mirova 13.11.2021 / 21h00

Kilauea - Sentinel-2 bands 12,11,8A & Modis thermal volcanic activity - doc.Mirova 13.11.2021 / 21h00

Kīlauea volcano erupts from a single vent in the western wall of Halema'uma'u crater. Activity returned to levels seen before the brief decline in activity. All lava activity is confined to the Halema'uma'u crater.


The western end of the lake showed a maximum elevation of about 802 meters (2,631 feet) above sea level by the HVO permanent laser range finder this morning, and a total increase of about 59 meters since the lava emerged on September 29. The webcams show lava spattering and puddles in the west vent and an increase in the area of ​​active lava on the surface of the lava lake to a similar extent to that seen before the decrease in activity on Sunday (November 7, 2021). The total eruption volume since the start of the eruption was estimated to be around 27 million cubic meters on November 9.
Sulfur dioxide emission rates remain high, with an emission rate for November 9, 2021 of around 2,600 tonnes per day. Summit inclinometers have generally recorded a neutral incline over the past day. Seismicity remains stable. The seismic activity remains below the background noise and the volcanic tremor has remained high since the start of the eruption.

The thermal anomalies noted by Mirova are VRP between 224 and 1449 MW. from November 12 to 14.


Current volcano alert level: Watch
Current aviation color code: Orange

 

Source: HVO

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