what was the first sign that mt. pinatubo had awoken
March 15 , 1991
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Section::::History.:Modern Pinatubo.:1991 activities leading to the eruption.

Mount Pinatubo
500560
6925972178795309942
NONE
Section::::History.:Modern Pinatubo.:1991 activities leading to the eruption.

Mount Pinatubo
500560