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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 : #volcanic activity
Popocatépetl - control flight of 16.10.2020 - Doc. Cenapred / Seguridad / CNPC

Popocatépetl - control flight of 16.10.2020 - Doc. Cenapred / Seguridad / CNPC

This October 16, with the support of the National Guard, expert staff from the Institute of Geophysics of the National Autonomous University of Mexico (UNAM) and the National Center for Disaster Reduction (CENAPRED), an overview of the Popocatépetl volcano been carried out to verify its terms and conditions. It has been visualized that the inner crater maintains a diameter of 360 to 390 meters and the approximate depth is 120 to 170 meters; the interior of the crater is covered with tephra.

Popocatépetl - control flight of 16.10.2020 - Doc. Cenapred / Seguridad / CNPC
Popocatépetl - control flight of 16.10.2020 - Doc. Cenapred / Seguridad / CNPC

Popocatépetl - control flight of 16.10.2020 - Doc. Cenapred / Seguridad / CNPC

The observatory recorded 165 exhalations accompanied by volcanic gas emissions and sometimes light amounts of ash. In addition, 51 minutes of low amplitude tremor and a volcano-tectonic earthquake were recorded yesterday at 10:58 am with a magnitude of 2.6.

During the night, a slight incandescence could be observed above the crater.
Then since the morning, an emission of water vapor, gas and a slight amount of ash has been observed, which is dispersed in a southwest direction.

The alert remains at Amarillo Fase 2, with a 12 km radius forbidden zone.

 

Source: Cenapred

Kerinci - eruptive activity of 17.10.2020 - photo @aksesnews / via Rizal Twitter - one click to enlargeKerinci - eruptive activity of 17.10.2020 - photo @aksesnews / via Rizal Twitter - one click to enlarge

Kerinci - eruptive activity of 17.10.2020 - photo @aksesnews / via Rizal Twitter - one click to enlarge

An orange VONA was issued for Kerinci, on the island of Sumatra, following an eruption on October 17 at 3:40 am local time, accompanied by an ash plume at 4,605 ​​meters asl. the eruption is in progress and ash emissions continue.

For the day of October 16, the PVMBG informs:

- 107 blast earthquakes, with an amplitude of 0.5 to 6 mm and the earthquake lasted 10 to 25 seconds.

- 4 distant tectonic earthquakes, with an amplitude of 13-32 mm, S-P 16-43 seconds and a long earthquake of 36-170 seconds.

- 1 episode of continuous Tremor, with an amplitude of 0.5-1 mm, dominating 1 mm.

The activity level remains at 2 / waspada.

Communities around Kerinci Volcano and visitors / tourists are not allowed to climb the crater on top of Kerinci Volcano within 3 km of the active crater (people are prohibited from doing activities within the danger radius.

 

Sources: PVMBG, Magma Indonesia and VAAC Darwin

Merapi - 17.10.2020 - photo PGM Selo

Merapi - 17.10.2020 - photo PGM Selo

At Merapi, in activity level 2 / waspada with a forbidden zone of 3 km radius around the summit, the main crater emits a white plume, of a fine to medium intensity, about 20 meters from the summit.

This October 16, 2020, it was recorded:

- 9 earthquakes of earth collapse

- 18 low frequency earthquakes

- 95 hybrid / multiphase earthquakes (note a sharp increase in this type of earthquake)

- 4 shallow volcanic earthquakes

- 5 tectonic earthquakes
 

Merapi - seismicity at 16.10.2020 - BPPTKG

Merapi - seismicity at 16.10.2020 - BPPTKG

Recommendation: 

The current potential danger is in the form of pyroclastic flows following the collapse of the lava dome and the fall of volcanic material due to explosive eruptions.

 

Source: PVMBG

Kanlaon - summit craters - photo archives 2017

Kanlaon - summit craters - photo archives 2017

The Kanlaon Volcano Monitoring Network recorded seven (7) volcanic earthquakes during the 24 hour observation period. Moderate emission of white vapor-laden plumes was observed rising 200 meters before drifting northwest and northeast.

Sulfur dioxide emissions were measured at an average of 656 tonnes / day on October 13, 2020.

Ground deformation data from continuous GPS measurements indicates slight inflation of lower and middle slopes since June 2020, while electronic monitoring of the short-term tilt on the southeast flanks has recorded inflation on the slopes. below average which began on June 21, 2020. These parameters may indicate hydrothermal or magmatic processes occurring under the edifice.

 

DOST-PHIVOLCS wishes to remind the public that the Kanlaon volcano is on Alert Level 1, which means it is in an abnormal state and has entered a period of unrest. Local communities and the public are strongly reminded that entry into the permanent danger zone (PDZ) with a radius of 4 kilometers must be strictly prohibited.

 

Source: Phivolcs

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