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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
Poas - the plume illuminated by the rising sun on 21.04.2017 / 5h15 - Emmanuel Herrera photography - via Ovsicori FB

Poas - the plume illuminated by the rising sun on 21.04.2017 / 5h15 - Emmanuel Herrera photography - via Ovsicori FB

Poas - activity on 21.04.2017 between 9 and 10 am loc - Actividad Volcán Poás de las 9am to las 10am to hoy Viernes 21 de Abril - Ovsicori

In Poas, the small explosive activity begun on 20 April before 7 pm. increased around 7 am on the 21st, characterized by a strong degassing and pyroclastic and ballistic ballistic emissions within 100 meters of the new mouth. They formed, by accumulation, a ring of debris around the vent, in place of the dome of 1953, pulverized these last days. The activity is accompanied by volcanic tremor.

 

Poas - schematic explaining of the current activity - one click to enlarge - doc. Ovsicori

Poas - schematic explaining of the current activity - one click to enlarge - doc. Ovsicori

Poas - eruption of incandescent blocks within the limits of the crater - Erupción of incandescent blocks llama la atención en el volcán Poás - Ovsicori

The gas flow increased from 1,000 tons / day on April 13 to 2,500 tons / day on the 20th and increased on 21st. Inflation continues in the last three months, and reached 8mm in its horizontal component , and 15 mm in its vertical component. A strong smell of sulfur is reported in Poasito, Cabuyal, Sabana Redonda, and San Isidro de Alajuela, and ash falls at Sabana Redonda.


Sources: Ovsicori and RSN

Volcán Poás - eruptive activity on 21.04.2017 / 17h14 - webcam therm RSN

 Volcán Poás - eruptive activity on 21.04.2017 / 18h42  - webcam visible / therm RSN

Volcán Poás - eruptive activity on 21.04.2017 / 18h42 - webcam visible / therm RSN

The strength of the explosions and their rythm, from 5 to 7 per hour, increased at the Fuego, accompanied by ash plume rising to 4,600-4,900 m asl. before moving more than 20 km to the northeast and east. Pulses of incandescent materials reach 150-300 meters above the crater, causing falls to more than 200 meters of distance and avalanches in the vicinity of the crater. Seismicity and explosions suggest an evolution towards a strombolian phase.


Source: Insivumeh

 Fuego - 21.04.2017 - photo via Clima Guatemala / Twitter

Fuego - 21.04.2017 - photo via Clima Guatemala / Twitter

 Fuego - sismo of 21.04.2017 - Doc. Insivumeh

Fuego - sismo of 21.04.2017 - Doc. Insivumeh

The Sernageomin announces that the Copahue measurement parameters indicate a decrease in volcanic activity that reaches the pre-eruption level of 2012.
Only an activity is maintained in relation to a hydrothermal system excited by the heat of the magmatic body.
Considering that the volcanic system meets a state of equilibrium, the level of technical alert has been reduced to green / no immediate risk.
However, it is possible to notice on the webcam an incandescence due to the high temperature of the gases emitted by the Agrio crater.
 
Source: Sernageomin - report 21.04.2017

 The Copahue, seen from Neuquen on 18.04.2017 in the evening - photo valecaviahue / Twitter

The Copahue, seen from Neuquen on 18.04.2017 in the evening - photo valecaviahue / Twitter

 Copahue - incandescent gases from the crater Agrio - webcam Sernageomin 21.04.2017

Copahue - incandescent gases from the crater Agrio - webcam Sernageomin 21.04.2017

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