Notes on Phillippines Activity

  Mount Pinatubo Timeline per Encyclopedia Britannica March 15. 1991 - Swarm of small earthquakes on Northwest side of Pinatubo April 2 - Steam explosions opened vents June 1 - New swarm of earthquakes June 3 - Small explosion June 7 - Eruption of steam and ash June 12 - Major eruption and major explosion …

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