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Mt. St. Helens
Pacific Northwest Research Station
333 SW First Avenue
Portland, OR 97204

(503) 808-2592

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United States Department of Agriculture Forest Service.
 
 
 
 
 
 
 
 
 
 
 
 
 

Map

Map shows the disturbance zones created by the May 18, 1980, eruption of Mount St. Helens.

 

SCORCH
Scorch forest.

BLOW DOWN
Blow down zone.

 

DEBRIS AVALANCHE
Debris Avalanche ponds.

MUDFLOW
Mudflow zone.

  

PYROCLASTIC FLOW
Pyroclastic flow zone.

CRATER WALLS
Crater Walls.

 

  

DOME
Dome.

SPIRIT LAKE
Spirit Lake.

USDA Forest Service - Pacific Northwest Research Station - Mount St. Helens
Last Modified: Monday, 18 April 2005 at 13:28:29 EDT
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