U.S. scientists to map interior of Mount St. Helens volcano
Wednesday, July 23, 2014 - 15:00
in Earth & Climate
SEATTLE (Reuters) - 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.