Report on Kanlaon (Philippines) — 23 April-29 April 2008
Smithsonian Institution / US Geological Survey
Weekly Volcanic Activity Report, 23 April-29 April 2008
Managing Editor: Sally Sennert.
Please cite this report as:
Global Volcanism Program, 2008. Report on Kanlaon (Philippines) (Sennert, S, ed.). Weekly Volcanic Activity Report, 23 April-29 April 2008. Smithsonian Institution and US Geological Survey.
Kanlaon
Philippines
10.4096°N, 123.13°E; summit elev. 2422 m
All times are local (unless otherwise noted)
According to news articles, PHIVOLCS lowered the Alert Level for Kanlaon to 0 on 25 April. Seismic activity was at background levels during 5 March-25 April, with 0-3 earthquakes per day. Mt. Kanlaon Natural Park opened for mountaineering activities; however visitors were warned that the risk of entering the 4-km permanent danger zone remained high.
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: Sun Star News