Magnitude 5.2 quake rattles parts of Davao Occidental

Robie de Guzman   •   December 25, 2020   •   431

MANILA, Philippines – A magnitude 5.2 earthquake rocked Davao Occidental on Friday, the Philippine Institute of Volcanology and Seismology (PHIVOLCS) reported.

In its bulletin, PHIVOLCS said the temblor occurred at 10 a.m., 89 kilometers southeast of Sarangani town in Davao Occidental.

It was tectonic in origin and had a depth of 65 kilometers.

Instrumental Intensity II was felt at Alabel, Sarangani and Instrumental Intensity I was felt at Kiamba, Sarangani; Koronadal City; General Santos City.

PHIVOLCS said it is not expecting damage nor aftershocks due to the quake.

The state seismologists earlier reported a magnitude 6.3 quake that struck off Calatagan, Batangas at 7:43 a.m. Friday.

Magnitude 5.8 earthquake rocks Occidental Mindoro

Marje Pelayo   •   May 12, 2021

MANILA, Philippines — A magnitude 5.8 earthquake rocked Occidental Mindoro at around 9:00 a.m. on Wednesday (May 12).

According to the report from the Philippine Institute of Volcanology and Seismology (Phivolcs), the center of the quake was located at Abra de Ilog.

It was tectonic in origin and had a depth of 110 kilometers.

The agency recorded the following instrumental intensities as a result of the earthquake:

Intensity V – Calatagan, Batangas

Intensity IV – Puerto Galera, Oriental Mindoro

Intensity III – Carmona, Tagaytay City, Cavite; Muntinlupa, Metro Manila; San Jose, Occidental Mindoro; Calapan City, Oriental Mindoro

Intensity II – Calumpit, Marilao, Plaridel, Bulacan; Las Piñas, Malabon, Marikina, Pasig, Quezon City, Metro Manila; Dolores, Gumaca, Mulanay, Quezon Province;
Olongapo City, Zambales

Intensity I – San Jose City, Nueva Ecija; Guagua, Pampanga; Infanta, Lopez, Polillo, Quezon Province

Alert Level 1 raised over Bulusan Volcano in Sorsogon

Marje Pelayo   •   May 12, 2021

MANILA, Philippines — The Philippine Institute of Volcanology and Seismology (Phivolcs) has raised alert status from zero to 1 over Bulusan Volcano in Sorsogon after recording more than 100 volcanic earthquakes in the past four days.

Alert Level 1 means that the volcano is currently in an “abnormal condition.”

According to the agency, the volcano has been exhibiting increased unrest after a total of 124 volcanic tremors recorded since Saturday (May 8) as well as sustained inflation based on ground deformation measurements.

“These parameters indicate that volcanic processes are underway beneath the edifice that are likely caused by shallow hydrothermal activity,” the agency said in an advisory posted on its website.

Phivolcs reminded local government units and the public that entry into the four-kilometer radius permanent danger zone must be strictly prohibited.

Also, vigilance in the two-kilometer extended danger zone on the southeast sector must be exercised due to the increased possibility of sudden and hazardous phreatic eruptions.

“People living within the valleys and along river/stream channels especially on the southeast, southwest and northwest sector of the edifice should be vigilant against sediment-laden stream flows and lahars in the event of heavy and prolonged rainfall,” the agency warned.

383 volcanic earthquakes recorded in Taal Volcano in past 24 hours

Aileen Cerrudo   •   April 14, 2021

MANILA, Philippines— The Philippine Institute of Volcanology and Seismology (Phivolcs) on Wednesday maintained Alert level 2 over Taal Volcano as it recorded 383 volcanic earthquakes in the past 24 hours.

Based on the latest bulletin, upwelling of hot volcanic fluids in the main crater lake occurred Tuesday morning (April 13) and 383 volcanic earthquakes, including 238 episodes of volcanic tremor lasting from one to 12 minutes occurred in the past 24 hours.

Phivolcs also said it continues to observe “a very slow and steady inflation and expansion of the Taal region that began after the January 2020 eruption.”

The agency reminds local government units around the area to be vigilant and continuously assess the situation. Civil aviation authorities must advise pilots to avoid flying close to the volcano.

“DOST-PHIVOLCS is closely monitoring Taal Volcano’s activity and any new significant development will be immediately communicated to all stakeholders,” the bulletin said. AAC

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