Site of the Mount St Helens Volcanic eruption, as it appeared in 1981. On May 18, 1980, a major volcanic eruption occurred at Mount St. Helens, a volcano located in the state of Washington, United States. The eruption (a VEI 5 event) was the only significant volcanic eruption to occur in the contiguous 48 states since the 1915 eruption of Lassen Peak in California.[1] However, it has often been declared as the most disastrous volcanic eruption in United States history

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Photo credit: © World History Archive / Alamy / Afripics
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Keywords: 5, archival, archive, damage, disastrous, eruption, event, geology, helens, historical, history, mount, seismology, st, state, states, united, vei, volcanic, volcano, washington