Topinka, USGSICVO, 1997, modified from Tilling, Topinka and Swanson, 1990, Eruptions of Mount St. Helens: Past, Present and Future.
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{{BotMoveToCommons|en.wikipedia|year={{subst:CURRENTYEAR}}|month={{subst:CURRENTMONTHNAME}}|day={{subst:CURRENTDAY}}}} {{Information |Description={{en|Map of the area around Mount St. Helens which were affected by the May 18, 1980 eruption. North is to t