Report on Kanlaon (Philippines) — November 1980
Scientific Event Alert Network Bulletin, vol. 5, no. 11 (November 1980)
Managing Editor: David Squires.
Kanlaon (Philippines) Seismicity still above normal in late November
Please cite this report as:
Global Volcanism Program, 1980. Report on Kanlaon (Philippines) (Squires, D., ed.). Scientific Event Alert Network Bulletin, 5:11. Smithsonian Institution.
10.412°N, 123.132°E; summit elev. 2435 m
All times are local (unless otherwise noted)
Seismic activity has lessened considerably, but remained above normal as of late November.
Geological Summary. Kanlaon volcano (also spelled Canlaon), the most active of the central Philippines, forms the highest point on the island of Negros. The massive andesitic stratovolcano is dotted 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, historically active vent, Lugud crater, to the south. Historical eruptions, recorded since 1866, have typically consisted of phreatic explosions of small-to-moderate size that produce minor ashfalls near the volcano.
Information Contacts: O. Peña, COMVOL, Quezon City.