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The 1991 eruption of Mount Pinatubo in the Philippines' Luzon Volcanic Arc was the second-largest volcanic eruption of the 20th century, behind only the 1912 eruption of Novarupta in Alaska. Eruptive activity began on April 2 as a series of phreatic explosions from a fissure that opened on the north side of Mount Pinatubo .
The most recent study of Mount Pinatubo before the activities of 1991 was the overall geological study in 1983 and 1984 made by F. G. Delfin for the Philippine National Oil Company as part of the surface investigations of the area before exploratory drilling and well testing for geothermal energy sources in 1988 to 1990. He recognized two life ...
Operation Fiery Vigil was the emergency evacuation of all non-essential military and U.S. Department of Defense civilian personnel and their dependents from Clark Air Base and U.S. Naval Base Subic Bay during the June 1991 eruption of Mount Pinatubo in the Republic of the Philippines.
Lake Pinatubo (Filipino: Lawa ng Pinatubo) is the summit crater lake of Mount Pinatubo formed after its climactic eruption on June 15, 1991. The lake is located in the Zambales Mountains, in Botolan, Zambales, near the boundaries of Pampanga and Tarlac provinces in the Philippines.
File:Mapanuepe Lake-before & after.gif. ... English: The map of Mapanuepe Valley before the eruption of Mount Pinatubo and after the lake has formed. Date: 1991: Source:
The now-retired German geographer had just moved to Sablayan, a municipality on Mindoro island, southwest of Manila, to assist victims of the 1991 Mount Pinatubo eruption.
The plane was named Mt. Pinatubo, after a long-inactive volcano then best known as the tallest mountain in Magsaysay's home province of Zambales. Mount Pinatubo, which had been dormant since the 14th century, later became active in 1991 and produced the second-largest terrestrial eruption of the 20th century, leaving over 800 people dead. [7]
Although the mountains are volcanic in origin, [2] Mount Pinatubo is the only active volcano in the mountain range. Its eruption on June 15, 1991 was the second most powerful volcanic eruption of the 20th century after the 1912 eruption of Novarupta in Alaska.