Digital elevation models of Mount St. Helens crater and upper North Fork Toutle River basin, based on 1987 and 1999 airborne photogrammetry surveys Digital elevation models of Mount St. Helens crater and upper North Fork Toutle River basin, based on 1987 and 1999 airborne photogrammetry surveys Digital elevation models of Mount St. Helens crater and upper North Fork Toutle River basin, based on 1987 and 1999 airborne photogrammetry surveys
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The lateral blast, debris avalanche, and lahars of the May 18th, 1980, eruption of Mount St. Helens, Washington, dramatically altered the surrounding landscape. Lava...
