MT. ST. HELENS NATIONAL
VOLCANIC MONUMENT
(photos from the United States Geological Survey)
Mt. St. Helens having a small steam-and-ash eruption in 1982.
This is a subduction zone stratovolcano in the Cascade Range of Washington
State, USA.
Mt. St. Helens, a subduction zone stratovolcano in the Cascade Range
of America's Pacific Northwest.
Toutle River (North Fork) filled with debris and ash deposits from the 1980s
eruptions of Mt. St. Helens.
Mt. St. Helens (background) & the Toutle River (North
Fork) filled with debris and ash deposits from the 1980s eruptions of Mt. St.
Helens.
MT. ST. HELENS NATIONAL
VOLCANIC MONUMENT
(photo from Gary Rosenquist)
Mt. St. Helens having a large lateral blast ash eruption at 8:32 AM,
Sunday, 18 May 1980.