Bulusan Volcano erupted ash to a height of 1km above the crater today. Monitoring of the volcano by the Philippine Institute of Volcanology and Seismology (Phivolcs) indicates magma is rising to the surface. Casiguran town, on Bulusan's northern slopes, was declared under a state of calamity on Friday after ash damaged houses, crops and forced schools to close. The number of people affected by the eruption has risen to 7700. One person has died from an asthma attack caused by exposure to volcanic emissions. Scientists recorded zero visibility in several places in Casiguran on Wednesday caused by thick volcanic ash from the series of explosions.