Report on Kanlaon (Philippines) — July 1978
Scientific Event Alert Network Bulletin, vol. 3, no. 7 (July 1978)
Managing Editor: David Squires.
Kanlaon (Philippines) Intermittent ash emission continues
Please cite this report as:
Global Volcanism Program, 1978. Report on Kanlaon (Philippines) (Squires, D., ed.). Scientific Event Alert Network Bulletin, 3:7. Smithsonian Institution. https://doi.org/10.5479/si.GVP.SEAN197807-272020
10.412°N, 123.132°E; summit elev. 2435 m
All times are local (unless otherwise noted)
Intermittent ash emission continued through July. The most recent ash emission occurred at 1253 on 31 July when a brownish column rose 700 m above the crater, accompanied by volcanic tremor.
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: G. Andal, COMVOL, Quezon City.