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Phivolcs records 20 Kanlaon Volcano quakes in 24 hours

/ 09:38 AM June 29, 2020

Photo from PHIVOLCS-DOST Facebook page

MANILA, Philippines — The Philippine Institute of Volcanology and Seismology (Phivolcs) has recorded 16 volcano-tectonic earthquakes on the western flanks and four volcanic earthquakes in the summit area of Kanlaon Volcano on Negros Island during a 24-hour observation period.

In its 8 a.m. bulletin on Monday, Phivolcs said it observed a “moderate emission” of white steam-laden plumes that rose 300 meters before drifting northwest and northwest.

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Sulfur dioxide (SO2) emission was measured at an average of 116 tons per day on June 27.  SO2 is a major gas component of magma.

“Ground deformation data from continuous GPS measurements indicate a slight deflation of the lower and mid slopes since January 2020. However, short-term electronic tilt monitoring on the southeastern flanks recorded inflation on the lower to mid slopes that began on June 21, 2020,” said Phivolcs.

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Phivolcs explained that these parameters indicate that hydrothermal or magmatic activities are occurring.

In its 8 a.m. bulletin on Sunday, the agency said it recorded 30 volcano-tectonic earthquakes on the western flanks and one volcanic earthquake in the summit area during the 24-hour observation period.

Alert level 1 remains in effect in the vicinity of the volcano, which means it is in abnormal condition and a period of unrest.

Entry into the four-kilometer radius permanent danger zone is strictly prohibited because of possible sudden and hazardous steam-driven or phreatic eruptions.

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TAGS: Kanlaon Volcano, Negros island, Phivolcs
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