Untitled Document Environmental Geology lecture outline - Environmental aspects of volcanism, case histories, and prediction of eruptions. Figure of Mt. St. Helens looking to the east and taken in 1996. The red arrow shows the northward direction of the lateral blast, while the Tuttle River valley is show with the lahar deposits in the foreground. This is the edge of the blast zone, and dead trees litter the slopes in the lower left corner. May 8th, large explosion and nuee ardente kills 30,000 inhabitants.
Stories differ as to why no action was taken.
Pinatubo, Phillipines - the video. Pinatubo as an example of a success. Regular success with flows on Hawaii. Mammoth Lake as not a success. In class laboratory .