1912
Mt. Katmai erupted in 1912 but it was actually Mt. Novarupta that erupted. The pressure made Katmai collapse and the pressure went to Novarupta and that mountain really blew. The eruption lasted 60 hours.
when did MT stromboli last erupt, and what were the effects of it.
2009
Mount Katmai erupted only 1 time in 1912.
It last erupted in 1992.
1893
1987 may third
July 4, 2009
Southern Alaska.
by erosion
I think mt st helens last erupted in 2004
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