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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
Etna SEC - small explosion and puff of ash and gas on 20.10.2021 / 09:17 - photo © Pippo Scarpinati

Etna SEC - small explosion and puff of ash and gas on 20.10.2021 / 09:17 - photo © Pippo Scarpinati

The INGV communicates that on October 20 from around 02:47 UTC, a weak resumption of Strombolian activity is observed at the level of the south-eastern crater of Etna.

So far, activity has produced sporadic isolated explosions accompanied by small puffs of gas / ash, which move southwest, dispersing into the atmosphere. Over the next few minutes, sporadic faint glows were observed, accompanied by gas emissions.

The average amplitude of the volcanic tremor oscillates between low and medium-low values. The locations of the tremor sources are concentrated in the area of ​​the central craters with depth between 2600 and 2700 m; altitude. The rate of occurrence of infrasonic events is moderate with sources located in the area of ​​the Bocca Nuova crater and some events at the SE crater.

 

Sources: INGV OE, Pippo Scarpinati and Gio Giusa

Etna SEC - explosion and puff of ash and gas on 20.10.2021 - photo Gio Giusa

Etna SEC - explosion and puff of ash and gas on 20.10.2021 - photo Gio Giusa

Map of the summit craters of Etna, morphological update from the SEC carried out following the drone and GPS campaign of October 4, 2021. - Doc. INGV OE

Map of the summit craters of Etna, morphological update from the SEC carried out following the drone and GPS campaign of October 4, 2021. - Doc. INGV OE

A strong eruption occurred on the volcano of the island-volcano of Manam in Papua New Guinea at 22:40 UTC on October 19, 2021. The ash plume rose to more than 15 km of altitude. The color of the air alert has changed to Red.

Another plume rose more than 10 km a few hours later.


A heavy blanket of ash on the island obscures it from the mainland. An abundant lava flow is reported in the valley northwest of the village of Budua, as well as a pyroclastic avalanche or pyroclasts fall on the villages of Baliau, Boda and Kuluguma.
The island is plunged into darkness, the mobile network is poor.

 

Sources: VAAC Darwin, local observers.

Manam - huge plume of gas and ash - photo PNG EVI / FB 20.10.2021

Manam - huge plume of gas and ash - photo PNG EVI / FB 20.10.2021

Manam - plume of gas and ash - photo Mangi Tais Agamguar 20.10.2021 / via Shérine France

Manam - plume of gas and ash - photo Mangi Tais Agamguar 20.10.2021 / via Shérine France

No significant changes in the activity of Cumbre Vieja on the island of La Palma; the volcano continues to feed the lava field at high effusion rates.

The flows further north continue to cause damage in the La Laguna area, destroying infrastructure, businesses and homes.

La Palma - lava flows by Sentinel-2 bands 12,11,8A on 20.10.2021

La Palma - lava flows by Sentinel-2 bands 12,11,8A on 20.10.2021

La Palma / Cumbre Vieja - the mouths aligned on the eruptive fissure - photo IGME 21.10.2021

La Palma / Cumbre Vieja - the mouths aligned on the eruptive fissure - photo IGME 21.10.2021

La Palma / Cumbre Vieja - the eruptive site at 21.10.2021 / 08:55 - photo IGME

La Palma / Cumbre Vieja - the eruptive site at 21.10.2021 / 08:55 - photo IGME

A cloud of sulfur dioxide (SO2) extended yesterday from the Canary Islands, passing over Spain, France and Germany, to Belarus.

As of October 19 at 18:56 UTC, the extent of the lava covered 866.1 ha (+ 54.3ha in 48 hours). 2185 buildings have been destroyed to date (+229 in 48 hours) - Copernicus data.

New evacuations were decided on October 20 at 8:30 p.m. by the Pevolca: Las Martelas, Marina alta, Marina Baja, La Condesa and Cuesta Zapata.

 

Sources: IGNes, InVolcan, IGME, RTVC, GEVolcan

Eruption of La Palma / Cumbre Vieja - 20.10.2021 the sulfur dioxide cloud over Europe - Doc. Adam Platform

Eruption of La Palma / Cumbre Vieja - 20.10.2021 the sulfur dioxide cloud over Europe - Doc. Adam Platform

La Palma - Lava flows of Cumbre Vieja at 19.10.2021 / 19h13 - Doc. Copernicus EMSR

La Palma - Lava flows of Cumbre Vieja at 19.10.2021 / 19h13 - Doc. Copernicus EMSR

During the 2021 North Atlantic Stepping Stones Expedition, the NOAA Ocean Exploration mapping team mapped (to varying degrees) about 40 seamounts in New England, 20 of which had little to no pre-existing data.

This expedition fills the gaps in our collective understanding of the North Atlantic seamount chains.

This image shows new New England seamount bathymetric data collected with the EM 304 MK II variant on the NOAA Okeanos Explorer ship during the expedition, overlaid on the multi-resolution global topographic data summary grid.

 

Source: NOAA Ocean Exploration

New England and Corner Rise Seamounts - Image courtesy of NOAA Ocean Exploration, 2021 North Atlantic Stepping Stones.

New England and Corner Rise Seamounts - Image courtesy of NOAA Ocean Exploration, 2021 North Atlantic Stepping Stones.

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