What are the Most Common Causes of Lahars?
The U.S. Geological
Survey published in their 2000 report the following potential reasons for a sudden lahar:
· Snow and ice on a volcano that melts quickly
· Water ejected from a crater lake (like on Mt. Kelud)
· Intense rainfall (common during and after a volcanic eruption)
o Mineral-rich rainwater
erodes loose debris and rock on the slope, creating a landslide that saturates quickly
address the problems of lahars during and after eruption, and also unexplained lahars.
What are some of the Impacts of Lahars?
· Nearly everything touched by a lahar is destroyed on impact
· There is a lot of sediment deposited on the plains around volcanoes (consequently making the grounds
very fertile); also adds layers of sediment to the pyroclastic/magma composition of the stratovolcano
· Entire communities can be buried
(Bourdier et. al.,