Right before a volcano erupts, molten rock, known as magma, is moving around underneath the surface. New research suggests this liquid magma is very rare. That’s an important finding for researchers trying to predict when a volcano may erupt.
Magma may not be bubbling beneath the Northwest’s volcanoes as much as you think.
Researchers studying Mount Hood have found that magma is often too cold to move around so much. And cold, here, is a relative term. About 750 degrees Celsius.