how long did mount st helens volcano eruption last for?

2006-12-03 03:16:45 · 2 answers · asked by Anonymous in Education & Reference ➔ Homework Help

The eruption began on 3/27/1980 and officially ended 10/28/1986.
The eruption of 1980.

2006-12-03 03:21:32 · answer #1 · answered by ????? 7 · 0⤊ 0⤋

http://www.fs.fed.us/gpnf/mshnvm/

9 hrs according to the US govt. site above

2006-12-03 03:20:14 · answer #2 · answered by lechemomma 4 · 0⤊ 0⤋

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