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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
 Bogoslof - seismogram showing the episodes of activity of 10 and 11 July 2017 - Doc. AVO

Bogoslof - seismogram showing the episodes of activity of 10 and 11 July 2017 - Doc. AVO

Two periods of eruptive activity marked the Bogoslof on 10 and 11 July 2017.


- The first one consists of a series of explosions that began on July 10 at 7:47 UTC and ended on 10.07 at 10:35 UTC, the AVO has passed the alerts to RED / Warning. A small cloud of ashes associated with the first episode reached 6,000 meters, and quickly dissipated in a southeasterly direction.
A rapid decline in seismicity around 11:00 UTC lowered alert levels to ORANGE / Watch.
- The second period of activity began around 6 pm UTC: seismicity and infrasound were increased for 8 minutes. No significant emissions were detected by satellite.


On July 11, at 01:06 UTC, the seismic network recorded an eruption that lasted about 15 minutes. No volcanic clouds, lightning or infrasound were detected.
Alert levels remain unchanged until data is evaluated.


Source: AVO

Fuego - strombolian activity and lava flow 10.07.2017 - photo Jiuwit Rosas via Clima Guatemala

Fuego - strombolian activity and lava flow 10.07.2017 - photo Jiuwit Rosas via Clima Guatemala

Fuego - RSAM 10.07.2017 - Doc. INSIVUMEH

Fuego - RSAM 10.07.2017 - Doc. INSIVUMEH

On the evening of July 10th, the Strombolian activity of the Fuego increased, feeding lava flows, one in the Las Lajas barrancas, 1900 m long, and others in barranca Seca and Santa Teresa, 1500 m long. A plume rising to 5,000 m asl then moves westward for 20 km; The ash falls affect Morelia, Panimache, Santa Sofia, El Porvenir and Sangre de Cristo.
Due to this increase in energy of the Fuego, the Insivumeh recalls the possibility of pyroclastic flows in the various barrancas.
 
Source: Insivumeh and Conred; Photos via Clima Guatemala.

Villarica - incandescence on the 09.07.2017 at the end of the evening - POVI webcam

Villarica - incandescence on the 09.07.2017 at the end of the evening - POVI webcam

In Chile, the Villarica and Copahue volcanoes show activity.


On 9 July late in the evening and on 10 July in the morning, POVI reported an active lava well at the Villarica and a visible incandescence between full moon and snowy summit.
 

Villarica - incandescense from 10.07.2017 in the morning - doc. POVI / Werner Keller

Villarica - incandescense from 10.07.2017 in the morning - doc. POVI / Werner Keller

The Copahue, in alert Amarilla, has a constant low-magnitude tremor, increasing punctually since June 28, associated with a gas exit of the crater El Agrio, and small explosions accounted for ash emissions. At the end of June, seismicity was dominated by volcano-tectonic earthquakes, related to the fragmentation of materials, and LP earthquakes associated with fluid dynamics.
 
Sources: Sernageomin & POVI / Werner Keller; Valecaviahue pictures
.

Copahue, the 07.07.2017 seen from Caviahue - photo Valecaviahue / Twitter

Copahue, the 07.07.2017 seen from Caviahue - photo Valecaviahue / Twitter

Copahue, the 08.07.2017 seen from Caviahue - photo Valecaviahue / Twitter

Copahue, the 08.07.2017 seen from Caviahue - photo Valecaviahue / Twitter

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