Skip to Main Content
25 years of ecological change at Mount St. Helens.Author(s): V.H. Dale; C.M. Crisafulli; F.J. Swanson
Source: Science, Vol. 308: 961-962
Publication Series: Scientific Journal (JRNL)
PDF: Download Publication (460 KB)
Description18 May 2005 marks the 25th anniversary of the massive eruption of Mount St. Helens. This eruption involved diverse geological processes (1) that disturbed forests, meadows, lakes, an drivers (2) (see the figure). A huge landslide and searing flows of hot gases and pumic framents (pyroclastic flows) inundated 60 km2 of land, obliterating preexisting ecosystems and landforms. A steam-driven blast left blown-down forest and scorched standing forest over more than 500 km2, but deposited generally <1 m of new material. A gentle rain of tephra (airborne volcanic rock fragments) fell from the sky and blanketed >1000 km2 of live forest and aquatic systems with >5 cm of deposits (2). The initial impression of a lifeless landscape quickly changed as surviving plants and animals reemerged.
- You may send email to email@example.com to request a hard copy of this publication.
- (Please specify exactly which publication you are requesting and your mailing address.)
- We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
- This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
CitationDale, V.H.; Crisafulli, C.M.; Swanson, F.J. 2005. 25 years of ecological change at Mount St. Helens. Science, Vol. 308: 961-962
- Effects of volcanic and hydrologic processes on forest vegetation: Chaitén Volcano, Chile
- Landslide initiation, runout, and deposition within clearcuts and old-growth forests of Alaska.
- Effects of wood on debris flow runout in small mountain watersheds.
XML: View XML