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Mount Pinatubo shows early signs of activity in April 1991. The volcano, located on the Philippine island of Luzon, had been quiet for centuries, and scientists knew little about its eruptive history.


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The second-largest volcanic eruption of the 20th century, and by far the largest eruption to affect a densely populated area, occurred at Mount Pinatubo on Saturday, June 15, 1991. The eruption produced high-speed avalanches of hot ash and gas, massive lahar floods and huge clouds of superheated volcanic material hundreds of kilometers across.


The cataclysmic eruption of Mount Pinatubo on June 15, 1991 was the second largest eruption of the 20th Century. It was about 10 times larger than Mount St. Helens in 1980. Using tools and techniques developed at Mount St. Helens and other volcanoes in the 1980s, a combined USGS/PHIVOLCS team was ...


Originally operated under the name COPE THUNDER, the exercise moved to Eielson in 1992 from Clark Air Base, Philippines, after the eruption of Mount Pinatubo on June 15, 1991. COPE THUNDER was re-designated RF-A in 2006. (U.S. Air Force photo by Staff Sgt. Shawn Nickel)


[In Photos: The Colossal Eruption of Mount Pinatubo] Nonetheless, only a few hundred people died in the initial eruption, thanks to round-the-clock volcano monitoring, proactive evacuation plans ...


Chronology of the 1991 eruption of Pinatubo volcano, Philippines 16 July 1990 A magnitude 7.8 earthquake hits 100 km northeast of Mt Pinatubo. 3 August 1990: Pinatubo awakes after >400 years Loud rumbling noises are heard around Pinatubo. A landslide occurs near the summit and steam vents appear on the ground. August 1990


Photos here are some more photos, scanned from prints. The time was June-July 1991. Mt Aryat was taken in 1988-89. Hope you can find a home for them. Later, Zig: Photo #1. Mt. Pinatubo eruption. June 1991: Video of one of Bob Hope's Visits to Clark AB (2.7 mb mpeg format) Photo #2.


This eruption distributed over 325 ft (100 m) of pyroclastic flow material on all sides of the volcano. It also marked the birth of the modern volcano. The magnitudes of eruptions since that event are decreasing with time. This photo depicts a secondary eruption on Mt. Pinatubo in May 1994. This eruption lasted about four hours.


The world’s largest volcanic eruption to happen in the past 100 years was the June 15, 1991, eruption of Mount Pinatubo in the Philippines. Bursts of gas-charged magma exploded into umbrella ash clouds, hot flows of gas and ash descended the volcano’s flanks and lahars swept down valleys. The ...