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Report on Kanlaon (Philippines) — 6 February-12 February 2008


Kanlaon

Smithsonian Institution / US Geological Survey
Weekly Volcanic Activity Report, 6 February-12 February 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, 6 February-12 February 2008. Smithsonian Institution and US Geological Survey.

Weekly Report (6 February-12 February 2008)

Kanlaon

Philippines

10.4096°N, 123.13°E; summit elev. 2422 m

All times are local (unless otherwise noted)


PHIVOLCS reported that during 7-10 February the seismic network for Kanlaon detected a significant rise in earthquakes. On 10 February the Alert Level was raised from 0 to 1 (out of 5). Cloud cover prohibited visual observations of the summit. The public was strongly advised not to enter the 4-km 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)