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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

The alert status of the Taal volcano in the Philippines was raised from alert level 1 (abnormal) to alert level 2 (increased unrest) this January 12 at 2:30 p.m. by Phivolcs

An increase in vaporization activity in at least five places inside the main crater was observed around 1 p.m. today, the greatest activity being constituted by a phreatic explosion which generated a plume of about 100 meters from high, still in progress since.

Taal - fumaroles on 12.01.2020 / 2:25 p.m. local - photo Phivolcs

Taal - fumaroles on 12.01.2020 / 2:25 p.m. local - photo Phivolcs

Taal - plume of the phreatic explosion on 12.01.2020 / 2:32 p.m. - photo Phivolcs

Taal - plume of the phreatic explosion on 12.01.2020 / 2:32 p.m. - photo Phivolcs

Since March 28, 2019, the seismic network of the Taal volcano has shown a moderate to high level of seismic activity. Some of these earthquakes were felt with an intensity ranging from intensity I (barely noticeable) to intensity III (weak tremors) in the barangays of Calauit, Balete, Sitio Tibag, Pira-Piraso and Buco, Talisay , Alas-as and Pulangbato, San Nicolas, Batangas. Often these earthquakes felt are accompanied by rumblings.

Today, three felt earthquakes were recorded at 07:35, 10:43 and 14:00. A seismic swarm started around 11:00 a.m. and continues at 2:10 p.m.

A slight inflation of the building from January 2019 was also recorded by GPS continuously after a period of general deflation since 2016.

Concentrations of dissolved carbon dioxide (CO2) in the main crater lake of Taal (MCL) on the basis of continuous measurements have increased gradually since February 2019, indicating a slight increase in the degassing supply of volcanic CO2 from the hydrothermal system in the lake .

 

Update: from 2:04 p.m. (2:04 PST), the main crater of the Taal volcano has intensified its eruptive activity, generating a plume of eruption of 1 km high accompanied by volcanic tremor and earthquakes felt on the island -volcano and the barangays of Agoncillo, Batangas. Ash falls are currently reported in the southwest sector of Taal.


In view of the above, DOST-PHIVOLCS now raises the alert status of Taal from alert level 2 to alert level 3.
This means that there is a magma intrusion which is probably at the origin of the current activity. The PHIVOLCS strongly recommends the evacuation of the island from the Taal volcano and the high-risk barangays of Agoncillo and Laurel, Batangas because of the possible risks of pyroclastic density currents and volcanic tsunami.

 

Source: Phivolcs

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