Kanlaon Volcano update: 25 quakes recorded in last 24 hours
MANILA, Philippines — A total of 25 volcano-tectonic earthquakes from the western flanks of the Kanlaon Volcano on Negros Island were recorded in the last 24 hours, the Philippine Institute of Volcanology and Seismology (Phivolcs) said on Friday.
In its 8 a.m. bulletin, Phivolcs said that it observed a “moderate emission” of white steam-lateen plumes that rose 200 meters before drifting northeast and northwest.
Sulfur dioxide (SO2) emission was measured at an average of 237 tons per day on June 24. 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,” said Phivolcs.
“Short-term electronic tilt monitoring on the southeastern flanks recorded continuing deflation on the lower slopes but inflation on the mid slopes since April 2020,” it added.
Phivolcs said these are indications that hydrothermal or magmatic activity is occurring beneath the surface.
On Thursday, 44 volcano-tectonic earthquakes were recorded from the western flanks of the volcano during the 24-hour observation period.
Alert Level 1 remains in effect in the vicinity of Kanlaon, which means it is in abnormal condition and a period of unrest.
Entry into the four-kilometer radius permanent danger zone is strictly prohibited due to possible sudden and hazardous steam-driven or phreatic eruptions.
Phivolcs reminded civil aviation authorities to advise pilots to avoid flying close to the volcano’s summit due to hazards posed by volcanic materials.
“DOST (Department of Science and Technology)-Phivolcs is closely monitoring Kanlaon Volcano’s activity and any new development will be relayed to all concerned,” the agency said.
Subscribe to INQUIRER PLUS to get access to The Philippine Daily Inquirer & other 70+ titles, share up to 5 gadgets, listen to the news, download as early as 4am & share articles on social media. Call 896 6000.