When even more highly gas-charged magma reached Pinatubo's surface on June 15, the volcano exploded, sending an ash cloud 40 km (25 mi) into the atmosphere. Volcanic ash and pumice blanketed the countryside.
1991 eruption of Mount Pinatubo
End date: September 2, 1991
September 2, 1991Type: Phreatic, Ultra-Plinian
