PHIVOLCS assesses if Mindanao quake affected nearby volcanoes
Marje Pelayo • December 16, 2019 • 1104
MANILA, Philippines – More than a hundred aftershocks were felt across Mindanao since a magnitude 6.9 earthquake hit Davao del Sur on Sunday (December 15).
According to Science and Technology Undersecretary and PHIVOLCS Officer in Charge Renato Solidum, their is a high possibility that the movement of Tangbulan Fault caused the earthquake.
Tangbulan Fault can generate up to magnitude 7.2 earthquake.
It measures to 69.2 kilometers and is located between Makilala-Malungon Fault and Digos Faults.
Solidum reminded of further aftershocks but the possibility of an even stronger tremor from both faults is minimal.
“Dahil ang lugar na iyan sa southern Mindanao ay matagal ng hindi nagkakaroon ng lindol na malalakas, (That area in Southern Mindanao has not experienced strong earthquakes for a long time),” Solidum said.
“Ngayon nagkataon na nagsimulang magsikilos ito (But now it is starting to move),” he noted.
The Philippine Institute of Volcanology and Seismology (PHIVOLCS) is now observing if the recent tremblor has impacted nearby volcanoes such as Mt. Apo and Mt. Matutum.
In 1991, Mt. Pinatubo in Zambales erupted a year after a strong earthquake occurred in 1990.
“Parang bote ng softdrinks. Kung may bote ka ng softdrinks [at] walang laman yung softdrinks, kahit anong alog mo walang lalabas siyempre. Pero kung may laman yung softdrinks at inalog mo pwedeng lumabas,” Solidum explained.
(Similar to a bottle of soda. If you have an empty bottle of soda, no matter how much you shake it, nothing will come out. But if it contains soda and you shake it, the liquid would spill.)
“So the condition is, the volcano will respond if there is magma ready to be erupted,” he added.
PHIVOLCS advised owners of structures to have their establishments check before occupancy.
It is also important to learn from past experiences to be ready for future earthquakes that may happen in different areas in the Philippines especially in Metro Manila.
“Nakita ninyo naman ang ilang mga video shared sa social media. Hindi ayos ang pagreresponde ng mga tao na nagsisitakbuhan (We saw from the videos shared on social media, the responses were chaotic. People were running confused),” Solidum noted.
“Kailangang maprotektahan ang ating sarili at baka magka-stampede pa kung lahat ay talagang tatakbo lang (We need to protect ourselves but stampede might happen if all of us would just run around),” he concluded. – MNP (with details from Rey Pelayo)
PHIVOLCS said the quake was felt at the following areas:
• Intensity IV – Sablayan and Rizal, Occidental Mindoro • Intensity III – Abra De Ilog, Santa Cruz and Calintaan, Occidental Mindoro; Calapan City and Bansud, Oriental Mindoro • Intensity II – Makati City; Batangas City; Baco, Oriental Mindoro • Intensity I – Puerto Galera, Oriental Mindoro; Tingloy, Batangas;
“This is an aftershock of the October 03, 2021 M5.3 Sablayan, Occidental Mindoro Earthquake event,” the agency noted in its report.
Damage and aftershocks are to be expected following the quake, PHIVOLCS said.
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