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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
Lewotolo - Dan Quinn photo july 2013

Lewotolo - Dan Quinn photo july 2013

The VSI raised the Lewotolo's alert level from 1 / normal to 2 / alert, and established a danger zone of 2 km radius around the volcano.
This stratovolcano is located on an elongated peninsula connected to the island Lembata, in the sea of ​​Flores,
Since early August 2017, a seismic swarm has been recorded, in connection with degassing; at the end of September, the seismicity changed of register, and between 1 and 6 October, there were recorded non harmonic tremor, hybrid earthquakes, superficial and deep volcanic earthquakes and some local tectonic earthquakes.

 

Lewotolo - Seismicity histogram revealing an increase from September 2017 - Doc. PVMBG

Lewotolo - Seismicity histogram revealing an increase from September 2017 - Doc. PVMBG

Lewotolo - hazard map / VSI and cone situation / Google Earth
Lewotolo - hazard map / VSI and cone situation / Google Earth

Lewotolo - hazard map / VSI and cone situation / Google Earth

The last eruption of the Lewotolo, of VEI 1, dates back to 2 - 14 January 2012 (GVP). The active cone is located atop a crater about 900 meters wide, occupying a southeastern area.

Source: PVMBG

Agung - the steam plume on 07.10.2017 / 20h30 Wita - photo Magma Indonesia

Agung - the steam plume on 07.10.2017 / 20h30 Wita - photo Magma Indonesia

At the Agung, there is still no eruption.

On October 9, the steam plume reached only 200 meters in height, against 1,500 meters on October 7 at 8:30 pm local time.
Seismicity consists on 9 October, from 0h to 6h local, of 117 deep VA volcanic earthquakes, 70 shallow volcanic earthquakes VB, and 9 local tectonic earthquakes,
Some hotels try to reassure the tourists present by posting a notice of "safe zone" ... see the poster below.


Sources: PVMBG & BNPB
 

Agung - Bali hotel initiative to reassure tourists - photo 08.10.2017 / BNPB

Agung - Bali hotel initiative to reassure tourists - photo 08.10.2017 / BNPB

In Vanuatu, Lopevi remains on alert level 2 and shows signs of disturbance. Observation surveys, carried out on 30.09, and 1 °, 3 and 6 October, show that activity is localized to the active crater located below the summit crater, and consists solely of volcanic and steam emissions.


Source: Vanuatu Geohazards Observatory
 

  Lopevi - overview of 03.10.2017 - Vanuatu geohazards observatory

  Lopevi - overview of 03.10.2017 - Vanuatu geohazards observatory

Lopevi - Degassing on 09.10.2017 / 9.30 am Loc - webcam Vanuatu geohazards observatory

Lopevi - Degassing on 09.10.2017 / 9.30 am Loc - webcam Vanuatu geohazards observatory

On the archipelago of the Canary Islands, the island of La Palma records a seismic swarm on 8 October, located by the Spanish ING at a depth of 23 to 33 km under the Cumbre Vieja zone.
To be continued ...


Source: ING Spain

La Palma - la Cumbre Vieja - photo aereasCanarias

La Palma - la Cumbre Vieja - photo aereasCanarias

La Palma - localization and magnitude / depth of earthquakes of 08.10.2017 - Doc. IGN Spain
La Palma - localization and magnitude / depth of earthquakes of 08.10.2017 - Doc. IGN Spain

La Palma - localization and magnitude / depth of earthquakes of 08.10.2017 - Doc. IGN Spain

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