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The eruption column of Mount Pinatubo on June 12, 1991, three days before the climactic eruption View to the west from Clark Air Base of the major eruption of Pinatubo on June 15, 1991. The June 15–16 climatic phase lasted more than fifteen hours, sent tephra about 35 km (22 mi) into the atmosphere, generated voluminous pyroclastic flows ...
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 .
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.
Pinatubo: 1,445 4,741 Zambales, Tarlac, Pampanga: 4 Reawakened in 1991, producing the 2nd largest eruption in the 20th century. Followed by milder eruptions in 1992 and 1993. Also minor additional activities in 2021. Permanently monitored. Ragang: 2,815 9,236
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.
Mount Pinatubo had no recorded historical eruption before its cataclysmic 1991 eruption. The Philippine Institute of Volcanology and Seismology (PHIVOLCS) currently lists 355 volcanoes in the Philippines as inactive. [ 2 ]
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.
Mount Pinatubo is on the Central Luzon landmass between the South China Sea and the Philippine Sea. The 1991 eruption of Pinatubo was andesite and dacite in the pre-climactic phase but only dacite in the climactic phase. The climactic phase had a volume of 3.7–5.3 km 3. [9]