Question: What was the first sign that mt. pinatubo had awoken?
Disambiguated questions and answers: question: What was the first sign that mt. pinatubo had awoken in 33,000 BC?
What was the first sign that mt. pinatubo had awoken in 7000 BC?
What was the first sign that mt. pinatubo had awoken from 4000 BC to 3000 BC?
What was the first sign that mt. pinatubo had awoken in 1500?
What was the first sign that mt. pinatubo had awoken in 1991?
answer: explosive eruptions
eruptions
eruptions
eruptions
volcano tectonic earthquakes
Natural Questions answer: March 15 , 1991 (from the Wikipedia article "Mount Pinatubo")