Lahars of Mount Pinatubo, Philippines

Fact Sheet 114-97
By: , and 



On June 15, 1991, Mount Pinatubo in the Philippines exploded in the second largest volcanic eruption on Earth this century. This eruption deposited more than 1 cubic mile (5 cubic kilometers) of volcanic ash and rock fragments on the volcano's slopes. Within hours, heavy rains began to wash this material down into the surrounding lowlands in giant, fast-moving mudflows called lahars. In the next four rainy seasons, lahars carried about half of the deposits off the volcano, causing even more destruction in the lowlands than the eruption itself.
Publication type Report
Publication Subtype USGS Numbered Series
Title Lahars of Mount Pinatubo, Philippines
Series title Fact Sheet
Series number 114-97
DOI 10.3133/fs11497
Edition Version 1.1
Year Published 1997
Language ENGLISH
Publisher U.S. Geological Survey,
Contributing office(s) Volcano Hazards Program
Description 1 sheet [2 p.]: ill., map ; 28 cm.
Online Only (Y/N) Y
Google Analytic Metrics Metrics page
Additional publication details