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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
 Cleveland - Crater and pancake Dome - archive images AVO 04.08.2015

Cleveland - Crater and pancake Dome - archive images AVO 04.08.2015

Volcanic actuality is a little busy today, and will necessarily be abbreviated.


On the American continent, starting from the north:
The effusive eruption begun on September 30 at Cleveland volcano continues, with the formation of a "pancake" dome, which covered about 4.200 m² on 1 October. Satellite images of 6 October suggest that dome growth continues, following the observed high surface temperatures.
The AVO has only a limited monitoring equipment on Cleveland, and will only react after an explosion of the dome, which is far in terms of days or months. The aviation alert level is Orange,


Sources: AVO & KDLG

Popocatépetl - 06.10.2017 / 10h31-10h34 - Click to enlarge - webcamsdeMexicoPopocatépetl - 06.10.2017 / 10h31-10h34 - Click to enlarge - webcamsdeMexico

Popocatépetl - 06.10.2017 / 10h31-10h34 - Click to enlarge - webcamsdeMexico

At Popocatépetl, the last 24 hours were marked by 14 low-intensity exhalations and at least five explosions: on 05.10, at 14h31, and 20h32; on 06.10, at 8:22, 10:31 and 20:14.
This list could be extended, the site of the Cenapred not being accessible this morning for more information. Light ash falls are reported in an area west of the volcano.
The day of 07.10 began with an explosion at 00:51, which was accompanied by the expulsion of incandescent fragments and a plume of ashes 2,500 m high.


Sources: Cenapred & WebcamsdeMexico.

Popocatépetl - 07.10.2017 / 0h50-51 - webcamsdeMexico
Popocatépetl - 07.10.2017 / 0h50-51 - webcamsdeMexico

Popocatépetl - 07.10.2017 / 0h50-51 - webcamsdeMexico

In Chile, three volcanoes are more or less active, Nevados de Chillan, Copahue and Llaima.


At the Nevados de Chillan complex, the volcano "Nuevo" presented ash emissions this October 6 at 15:40 and 18:25.

Complex Nevados of Chillan - 06.10.2017 / at 15h40 and 18h25 - pictures SernageominComplex Nevados of Chillan - 06.10.2017 / at 15h40 and 18h25 - pictures Sernageomin

Complex Nevados of Chillan - 06.10.2017 / at 15h40 and 18h25 - pictures Sernageomin

Copahue - 06.10.2017 - webcam sernageomin

The Copahue presents a passive and continuous superficial activity at the level of the crater El Agrio, which emits diffuse gray plumes. The related seismic activity remains at a low level and the level of alert is maintained to green.

Copahue seen from Caviahue on 06.10.2017 in the morning - photo Valecaviahue

Copahue seen from Caviahue on 06.10.2017 in the morning - photo Valecaviahue

For Llaima, which is still in green alert, OVDAS issued a special activity report on 5 October, in which it reports that the activity of this volcano is linked to a change in the dynamics of internal fluids, regular and with displacements reduced, which is qualified by a seismicity different from those of previous years.
Some volcano-tectonic earthquakes and continuous deformation were recorded.


Sources: Sernageomin, OVDAS, Chile Volcanoes, Biobio Chile noticias.

 Briefing on Llaima at OVDAS on 3 October - Doc.OVDAS

Briefing on Llaima at OVDAS on 3 October - Doc.OVDAS

No major changes to the Agung, where the seismicity remains high and slightly up, accompanied by emissions at 200 meters above the summit this morning October 7
 
Sources: PVMBG, BNPB e Magma Indonesia.

The Agung surmounted by a small plume of 200 meters on 07.10.2017 / 6:08 Wita - BNPB

The Agung surmounted by a small plume of 200 meters on 07.10.2017 / 6:08 Wita - BNPB

Agung - last histogram of seismicity - doc. Magma Indonesia 05.10.2017

Agung - last histogram of seismicity - doc. Magma Indonesia 05.10.2017

On Ambae, Vanuatu, the VMGD lowered the alert level from 4 to 3, with restriction of the danger zone at 3 km from the Voui Lake vent.
The eruption continues, but remains stable within the boundaries of the summit craters of Lombenben. Thermal photos and images taken between September 30 and October 5 during aerial observations show limited activity, caracterzed by small explosions and the ejection of incandescent blocks by vents located on the small island of Lake Voui. Brad Scott reports that the small lava flow has stopped.
The explosions remain audible and a glow remains perceptible at night by the local inhabitants.
It is necessary to wait for a future evolution, before the decision of a possible return of the evacuees can be envisaged.


Sources: VMGD and international observers.

Ambae, Prevention card at 06.10.2017 - doc. GMVD

Ambae, Prevention card at 06.10.2017 - doc. GMVD

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