PHIVOLCS reported that the seismic network recorded 6-44 volcano-tectonic earthquakes per day at Kanloan during 23-30 June and 1-4 volcanic earthquakes during 27-29 June. Steam plumes rose 100-300 m above the summit and drifted NE, NW, and SW. A M 3.6 earthquake was recorded at 1900 on 23 June and was felt at Intensity III in La Carlota City and at Intensity II in Bago City, Negros Occidental. Sulfur dioxide emissions were 438, 237, and 116 tonnes per day on 13, 24, and 27 June, respectively. The Alert Level remained at 1 (on a scale of 0-5) and PHIVOLCS reminded the public to remain outside of the 4-km-radius Permanent Danger Zone.

Geological Summary. Kanlaon volcano (also spelled Canlaon) forms the highest point on the Philippine island of Negros. The massive andesitic stratovolcano is covered with fissure-controlled pyroclastic cones and craters, many of which are filled by lakes. The largest debris avalanche known in the Philippines traveled 33 km SW from Kanlaon. The summit contains a 2-km-wide, elongated northern caldera with a crater lake and a smaller but higher active vent, Lugud crater, to the south. Eruptions recorded since 1866 have typically consisted of phreatic explosions of small-to-moderate size that produce minor local ashfall.

Source: Philippine Institute of Volcanology and Seismology (PHIVOLCS)