David Harlow is one of the few volcano seismologists in the world. He has been studying volcanoes for over 40 years, and he was a member of the team that discovered the first known earthquake on Mount St. Helens. 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 prediction 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 may have to be abandoned.
David Harlow is one of the few volcano seismologists in the world. He and a team of scientists from the U.S. Geological Survey and from the Philippines listen to the signs 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 prediction 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 may have to be abandoned.