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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 : #Actualités volcaniques
Nevados de Chillan, active dome - thermal camera / Sernageomin 31.01.2018
Nevados de Chillan, active dome - thermal camera / Sernageomin 31.01.2018

Nevados de Chillan, active dome - thermal camera / Sernageomin 31.01.2018

In the context of recurring explosive activity, a strong explosion stands out at the Nevados de Chillan complex on February 2 at 12:02 local time. It was accompanied by a plume of white and gray coloring, reaching a height of 2,500 meters.

According to Sernageomin, it is likely that part of the Gil-Cruz dome, located in the active crater Nicanor has been affected.

The sound wave of the explosion was heard in Las Trancas, 10 km from the eruptive center, and Gran Hotel Termas de Chillan, 5 km away, as well as the infrasonic system.

The technical alert remains at amarillo.

An overview of January 31, 2018 showed that the dome growth process was continuous, and that its temperature was high, around 500 ° C according to the thermal camera. The gas emissions sometimes took on a greyish color highlighting the presence of particles.

Source: Sernageomin
 

Nevados of Chillan - explosion on 02.02.2018 / 12h02 - photo Sernageomin

Nevados of Chillan - explosion on 02.02.2018 / 12h02 - photo Sernageomin

In Mayon, the day of February 2 was marked by a low and sporadic fountaining, and degassing; this activity produced small white to slightly gray plumes, with the exception of an episode at 9:18, during which the gray ash plume reached a height of 1,000 meters.

During the night, the effusion fed the lava flows into the Miisi, Bonga-Buyuan and nearby drainages; the flows now reach 3,200 and 4,300 meters in length from the crater.

Seismicity is characterized by 17 volcanic earthquakes, and 10 tremor episodes. Sulfur dioxide emissions have averaged 1.583 tonnes per day, and inflation is continuous.

Source: Phivolcs
 

Mayon - updated map of lahar risk areas - Doc.Phivolcs

Mayon - updated map of lahar risk areas - Doc.Phivolcs

The GSJ has released the latest Nishinoshima elevation data, and a 3D view of the topographic changes due to the 2017 eruption.

Source: Fumihiko Ikegami / UTAS PhD Student

3D model of Nishinoshima on 03.07.2016 / Before eruption 2017 - 3Dmodel by F. Ikegami - GSJ data

3D model of Nishinoshima on 03.07.2016 / Before eruption 2017 - 3Dmodel by F. Ikegami - GSJ data

3D model of Nishinoshima in January 2018 / After eruption 2017 - 3Dmodel by F. Ikegami - GSJ data

3D model of Nishinoshima in January 2018 / After eruption 2017 - 3Dmodel by F. Ikegami - GSJ data

Nishinoshima - photo GSJ of 17.01.2018 and the eruption of 25.05.2017 by Nasa Earth explorer - a click to enlargeNishinoshimaNishinoshima - photo GSJ of 17.01.2018 and the eruption of 25.05.2017 by Nasa Earth explorer - a click to enlargeNishinoshima

Nishinoshima - photo GSJ of 17.01.2018 and the eruption of 25.05.2017 by Nasa Earth explorer - a click to enlargeNishinoshima

VAAC Tokyo issues an ash dispersion advisory for Karymsky / Kamchatka in connection with a possible eruption on February 3 at 6:10 am and the extension of a cloud toward the north * west.

No confirmation by KVERT for now.

Source: VAAC Tokyo
 

Karymsky - Volcanic Ash Advisory 030.02.2017 - VAAC Tokyo

Karymsky - Volcanic Ash Advisory 030.02.2017 - VAAC Tokyo

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