David Harlow is one of the few active seismologists in the world . He and a team of scientists from the U.S. Geological Survey and from the Philippines listen to the eruption from Mount Pinatubo ; it had been inactive for 600 years . "My husband is not unaccustomed to danger."; Lord said Harlow's love affair with volcanoes began when he was an undergraduate student at Dartmouth College and his professor took the entire class to observe an eruption in Guatemala.; Pinatubo erupted according to the predictions by Harlow and the team , blowing ash 75,000 feet into the air and sending rivers of molten ash down its slope . The accurate predictions enabled the evacuation of 84,000 people from the area . Evacuees included personnel and dependents from the U.S. Clark Air Force Base . The base would have to be rebuilt .
David Harlow is one of the few active seismologists in the world . He and a team of scientists from the U.S. Geological Survey and from the Philippines listen to the eruption from Mount Pinatubo ; it had been inactive for 600 years . Pinatubo erupted according to the predictions by Harlow and the team , blowing ash 75,000 feet into the air and sending rivers of molten ash down its slope . The accurate predictions enabled the evacuation of 84,000 people from the area . Evacuees included personnel and dependents from the U.S. Clark Air Force Base . The base would have to be rebuilt .