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Pre-eruption seismograms recovered for 1980 Mount St. Helens event

from Seismological Society of America

Nearly 40 years ago, analog data tapes faithfully recorded intense seismic activity in the two months before the historic eruption of Mount St. Helens in Washington State in May 1980. It took some lengthy and careful restoration efforts — including a turn in a kitchen oven for some of the tapes — to recover their data. more


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