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US Scientists to Map Interior of Mount St. Helens Volcano

A series of explosions set off by a team of scientists were expected to rattle Washington state's Mount St. Helens on Wednesday as researchers map the interior of the volcano, whose 1980 eruption was the deadliest in U.S. history. Mount St. Helens, about 95 miles (150 km) south of Seattle and 50 miles (80 km) north of Portland, erupted in an explosion of hot ash in May 1980, spewing debris over a wide area, killing 57 people and causing more than a billion dollars in...

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