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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
 Agung - double plume issued 29.11.2017 - photo Nasa Terra Modis

Agung - double plume issued 29.11.2017 - photo Nasa Terra Modis

The thermal anomaly observed at Agung in recent days has been several times: 27.11 with 51 MW, 28.11 at 22:20 WITA with 97 MW, 29.11 with 5 MW, attesting to magmatic activity, and risks of ejection of incandescent ballistic projectiles and ashes, at first, production of lava flows and pyroclastic flows, or more in case of plinian eruption.
 
Several institutions recall the main dangers inherent to the eruption of Agung, primary and secondary ... here is an example: Devay Natamangala / PVMBG reports a ballistic ejection observed November 28 at 13:32 WITA in the village of Dukuh, located 4-5 km to the NNE of Agung. She followed an overscale tremor episode and an eruption.


 

Agung - three thermal anomalies identified by MIROVA Modis (green and yellow frames)

Agung - three thermal anomalies identified by MIROVA Modis (green and yellow frames)

 Main dangers inherent in the eruption of Agung - Doc. GFZ

Main dangers inherent in the eruption of Agung - Doc. GFZ

In the day of November 29, a gray plume was seen at a height of 1,500-2,000 meters above the crater; the 17:25 WITA eruption and plume height could not be observed because of the fog covering the summit.
The seismicity is relatively low, with 9 VA deep volcanic earthquakes, 23 VB superficial volcanic earthquakes, a local tectonic earthquake, an eruption earthquake, and a continuous tremor of amplitude varying between 1 and 24 mm (with a dominant at 2 mm) ; On November 30, the tremor level decreased with a dominant at 1 mm.

Agung - 29.11.2017 / 9h03 - webcam Telkomsel

Agung - 29.11.2017 / 9h03 - webcam Telkomsel

 Agung - night gmow - 29-30.11.2019 - photo Rappler Indonesia

Agung - night gmow - 29-30.11.2019 - photo Rappler Indonesia

Agung - steam plume this 30.11.2017 / 14:59 WITA - webcam Telkomsel

Agung - steam plume this 30.11.2017 / 14:59 WITA - webcam Telkomsel

The Regent of Karangasem has established a state of emergency for 14 days, from 27.11 to 10.12.2017, a period that can be reviewed, to allow easier mobilization of human and material resources, and a more direct management of resources, agencies and institutions.


As for the inconvenience due to ashes on the air traffic, the airport of Bali is opened, this November 30, while that of Lombok was closed again.

Agung - last Volcanic Ash Advisory this 30.11.2017 - doc. VAAC Darwin

Agung - last Volcanic Ash Advisory this 30.11.2017 - doc. VAAC Darwin

In Chile, the Copahue volcano has spasmodic tremors of low energy for several days, sometimes associated with acoustic signals, related to small explosions inside the conduit, without apparent changes in surface activity.
 
Source: Sernageomin

Copahue - picture Valecaviahue / Twitter

Copahue - picture Valecaviahue / Twitter

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