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Scientists: Philippines' Mayon Volcano Ready to Erupt

The Mayon volcano appeared ready to blow its top Monday as six explosions sent ash columns up to a half-mile high and led officials to evacuate 50,000 people from an extended danger zone.

The Philippine Institute of Volcanology and Seismology raised the alert to level 4, saying an explosive eruption appeared imminent. Level 5 represents an ongoing eruption.

Officials extended the danger zone to five miles on the volcano's southern side, from 4.3 miles earlier.

The new area included at least five neighborhoods in Legaspi city, where classes were immediately suspended. Adjacent areas "should prepare for evacuation in the event explosive eruptions intensify," a volcanology institute advisory said.

"More than 50,000 people will be expected to be evacuated," said Jukes Nunez, a provincial disaster officer in Albay province. They include people who have ventured back inside the danger zone to tend crops in the fertile volcanic soil.

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Army trucks and other government vehicles have been deployed to ferry residents to at least 30 evacuation centers, Nunez added.

Gerry Losentales, a poor 87-year-old farmer, has refused to leave his hut near his small vegetable farm even after the land was partly seared by lava flows a few days ago. He was among dozens of residents ordered to evacuate Monday from Mabinit village below the volcano.

"I survive by tending that farm and I have lived here all my life," a teary-eyed Losentales said as soldiers helped him board an army truck loaded with villagers to be brought to a temporary school shelter. "I hope the government can help me now."

Lava began flowing July 14 and has been slowly extending down Mayon's slopes.

Volcanologist July Sabit said the alert level was raised after six explosions were monitored starting at 7:08 a.m., with ash columns reaching up to 2,625 feet high. "Lava also continues to flow," he said.

Earlier, volcanologists said they detected 21 low-frequency volcanic earthquakes in the last 24 hours. Renato Solidum Jr., head of the volcanology institute, said the lava flow could continue, or the eruption could shift from quiet to explosive.

Brig. Gen. Arsenio Arugay, head of a task force that will respond to the situation, was given four to 10 hours to mobilize all concerned agencies.

Last week, the government deployed troops to keep sightseers away from the edge of advancing lava. Solidum earlier said the danger could come from collapse of the lava dome or a sudden explosive eruption that could send pyroclastic flows — clouds of superheated gas and ash — racing down the volcano's slopes.

Mayon is one of the Philippines' 22 active volcanos. Its most violent eruption, in 1814, killed more than 1,200 people and buried a town in mud. A 1993 eruption killed 79 people.

The Philippines is in the Pacific "Ring of Fire," where volcanic activity and earthquakes are common.