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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 - the eruption of Cumbre Vieja and the flows from the Montaña de Triana - photo IGME 27.11.2021 / 20h.

La Palma - the eruption of Cumbre Vieja and the flows from the Montaña de Triana - photo IGME 27.11.2021 / 20h.

In La Palma, the eruptive activity of Cumbre Vieja was a little lower on the surface, but the internal activity remains similar. The fountaining activity at the vents continues, less intense compared to the previous days.

The ash and steam plume only reached a little over 1000 m elevation today, although this is in part due to the stronger easterly winds pushing the plume downward and downward. over the ocean.

The central flows are fed by the eruptive focus that appeared on the eastern flank of the cone, reports PEVOLCA. In addition, yesterday there was a small overflow in the Las Norias area and there is a widening in coulée 7 at the height of La Laguna mountain.

The flow produced by the vent that appeared near the abandoned house no longer appears to be active.

La Palma - Emission center of the southern flow of Las Manchas, very close to a house abandoned, on 25.11 - Video screenshot 1-1-2 Canarias 27.11.2021 via Ruben Lopez

La Palma - Emission center of the southern flow of Las Manchas, very close to a house abandoned, on 25.11 - Video screenshot 1-1-2 Canarias 27.11.2021 via Ruben Lopez

Overview of all the emission centers of the main cone. The output of the lava jet with emission of ash is observed and the rest is observed gas and water vapor. Yellowish precipitates of Sulfur (S) continue to be visible. 11/27/2021 / IGME

LaPalma - thermal anomalies at 11/28/2021 / 2:40 a.m. - Doc. Mirova_MODIS_Latest10NTI

LaPalma - thermal anomalies at 11/28/2021 / 2:40 a.m. - Doc. Mirova_MODIS_Latest10NTI

La Palma - seismicity at 27.11.2021 - Doc. IGN - one click to enlargeLa Palma - seismicity at 27.11.2021 - Doc. IGN - one click to enlarge

La Palma - seismicity at 27.11.2021 - Doc. IGN - one click to enlarge

There is an improvement in air quality levels, good for both sulfur dioxide SO2 and PM10 particles, at all resorts on the island.

Seismicity remains low at intermediate depths, with 74 earthquakes in two locations, 10-15 and more than 30 km deep, and the maximum magnitude was 3.5. For the first time since September 11, there is no trace of an earthquake felt by the population. In addition, the tremor remains weak.

The GNSS network shows an inflation of 6 cm between November 24 and 26 at station LP03 near the eruptive centers, and a slight deflation at station LP01

Aena announced the completion of de-ashing works at La Palma airport, which is operational again.

 

Sources: InVolcan, IGME, IGN, DSN, RTVC, 1-1-2 Canarias

Yasur - VGO webcam 11.27.2021 / 05:30 am

Yasur - VGO webcam 11.27.2021 / 05:30 am

The activity of the Yasur volcano continues in a state of major unrest. The volcanic alert level remains at level 2.

New ground observations suggest that Yasur's volcanic activity continues to produce strong explosions with emitting steam and ash, including volcanic bombs falling inside the crater. With this current activity and the continued presence of volcanic gases and / or volcanic ash around the summit crater, the danger zone is now 600 meters around the volcanic cone. Rashes can occur with little or no warning.

 

Source: VGO / Vanuatu Geohazards observatory

Stromboli - 11/26/2021 / 6:42 a.m. - webcam INGV Sct

Stromboli - 11/26/2021 / 6:42 a.m. - webcam INGV Sct

Stromboli - 28.11.2021 / 08:36 - webcam therm INGV

Stromboli - 28.11.2021 / 08:36 - webcam therm INGV

At Stromboli, the lava overflow fed by the area of ​​the northern crater continues to be active on November 27, whose front remains confined to the intermediate part of the Sciara del Fuoco. The hot material continues to break away, rolling down the slope of the Sciara del Fuoco; occasionally it reaches the coast.

Ordinary Strombolian activity persists in both the north and south-central crater areas, often with simultaneous explosions at multiple mouths.
In the period since the previous press release, the volcanic tremor has remained at average levels. Sometimes, in conjunction with slightly more energetic explosions, it reached medium to high values.

At 6:46 p.m., the INGV announced that the lava overflow fed by the area of ​​the North crater was no longer active, however occasional phenomena of hot material detachment from the front continued to roll along the slope of the Sciara del Fuoco. Strombolian activity persists in the two areas of the north and south-central craters.

 

Source: INGV OE

Grimstvötn - GPS 28.11.2021 / 07:45: less 2.375 m - Doc. brunnur.vedur.is

Grimstvötn - GPS 28.11.2021 / 07:45: less 2.375 m - Doc. brunnur.vedur.is

The summit  ice cover at Grímsvötn has now sunk by 2.375 m. There is no going back; Water can collect on its way through the ice, but eventually there will be a jõkulhlaup in Gígjukvísl.

 

Sources: vedurstofa islands https://brunnur.vedur.is/gps/grimsvotn.html & Un. Iceland http://husbondi.rhi.hi.is/gvth/index.html

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