A brief ash eruption began at [0610] on 27 June. A grayish eruption column rose [~1,500 m] above the summit before being blown S by strong prevailing winds. Ash fell on S-flank villages within 8 km of the summit. The eruption ended after about 20 minutes, and was succeeded by voluminous but low-pressure emission of white vapor.

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.

Information Contacts: G. Andal, Commission on Volcanology (COMVOL), Quezon City.