Philippines

NDRRMC update - SitRep No. 2 re Taal Volcano Update

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Source: DOST-PHIVOLCS and OCD Region IV–A

  1. Situation Overview Alert Level 2 is hoisted over Taal Volcano, with the interpretation that magma has been intruding towards the surface, as manifested by CO2 being released in the Main Crater Lake and increase in seismic activity

Taal Volcano’s (14.0000°N, 120.9833°E) seismic netw ork recorded seven (7) volcanic earthquakes during the past 24 hours. Water temperature slightly increased from 30.0°C to 30.5°C. Gas measurements conducted at Taal Main Crater lake last January, February and March 2011 yielded carbon dioxide (CO2) emission values of 2,250 tonnes per day (t/d), 1875 t/d and 4, 4,670 t/d respectively. The remarkable increase in CO2 concentration indicates the anomalous gas release from the magma at depth. Result of the ground deformation survey (precise levelling) conducted around the Volcano Island last 01-11 April 2011 showed that the volcano edifice is slightly inflated as compared with the 01-09 February 2011 survey