Mount St. Helens has been studied for decades, yet scientists still cannot simply look beneath the volcano and see how magma moves through the Earth. That changed dramatically in 2014, when researchers carried out one of the most ambitious seismic experiments ever attempted at the volcano.
As part of the Imaging Magma Under St. Helens (iMUSH) project, scientists deliberately set off 23 controlled explosions around Mount St. Helens. They then used thousands of seismic instruments to record the waves traveling through the ground.
