Studying volcanic eruptions in the 1980s has resulted in better forecasting through expendable instruments that can transmit remotely and be optimally placed, increased knowledge of individual volcanic history, and distinctive tremor recognition. Eruptions at Alaska's Redoubt in 1989 and the Philippines' Pinatubo, which began giving signs of erupting two months ago after 600 years, were both forecast. The thicker and more extensive the deposit, the bigger the eruption.; 3. Pinatubo's evacuation was expensive, considering the looting, factory shutdowns, and unattended crops and livestock; but only 101 lives have been lost so far. The most recent eruption on Hawaii's Big Island occurred in May 2010, when a lava dome collapsed into the ocean with an explosive force equivalent to about 100 megatons of TNT.
Studying volcanic eruptions in the 1980s has resulted in better forecasting through expendable instruments that can transmit remotely and be optimally placed, increased knowledge of individual volcanic history, and distinctive tremor recognition. Eruptions at Alaska's Redoubt in 1989 and the Philippines' Pinatubo, which began giving signs of erupting two months ago after 600 years, were both forecast. Pinatubo's evacuation was expensive, considering the looting, factory shutdowns, and unattended crops and livestock; but only 101 lives have been lost so far. The most recent eruption on Hawaii's Big Island occurred in May 2010, when a lava dome collapsed into the ocean with an explosive force equivalent to about 100 megatons of TNT.