Mount St. Helens erupted often between 1980 and 1986. An explosive eruption on March 19, 1982, sent pumice and ash 9 miles (14 kilometers) into the air, and resulted in a lahar (the dark deposit on the snow) flowing from the crater into the North Fork Toutle River valley. Part of the lahar entered Spirit Lake (lower left corner) but most of the flow went west down the Toutle River, eventually reaching the Cowlitz River, 50 miles (80 kilometers) downstream.
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Sujet

Mount St. Helens erupted often between 1980 and 1986. An explosive eruption on March 19, 1982, sent pumice and ash 9 miles (14 kilometers) into the air, and resulted in a lahar (the dark deposit on the snow) flowing from the crater into the North Fork Toutle River valley. Part of the lahar entered Spirit Lake (lower left corner) but most of the flow went west down the Toutle River, eventually reaching the Cowlitz River, 50 miles (80 kilometers) downstream.

Info+

Photographe : Science History Images, Science History Images

Crédit

Photo12/Alamy/Science History Images, Science History Images

Notre référence

LMY25T03_2HJCNH1

Utilisation

uniquement en France

Model release

Non

Property release

Non

Licence

Droits gérés

Format disponible

16,1Mo (824,4Ko) / 24,9cm x 16,3cm / 2940 x 1920 (300dpi)

Mots clés

1980 1980s 1982 eruption 20th century america cascade range cascade volcano crater damage deadliest debris disaster earth science eruption geochemical geologic hazard geology geophysical history lahar lake mount st helens mount st helens eruption natural disaster north fork toutle river phemomena photo post-eruption river spirit lake usa usgs valley volcanic eruption volcano washington state

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