LEGAZPI, Philippines – The Philippines' most active volcano could have a huge eruption within days, officials warned Sunday after detecting a drastic surge in earthquakes and eerie rumbling sounds in surrounding foothills. Tens of thousands of villagers have been evacuated as a precaution.
Scientists raised the alert level for theafter 453 were detected in a five-hour span Sunday, compared to just over 200 Saturday, said Renato Solidum, chief of the .
The five-step warning system was raised to level four, meaning a hazardous eruption "is possible within days." Level five is when a major eruption has begun.