Mt. St. Helens erupted just weeks before my high school graduation. 

St. Helens apparently is just one big cold and wet stone

The summer months were among the coldest I recollect and I lived thousands of miles away.  Now, scientists probing the mountain claim there isn’t any lava underneath, but only rock.  St. Helens apparently is just one big cold and wet stone, although.  It isn’t permanently disabled.  This is because much of the Northwest is just rock piled atop huge magma chambers.  The magma will find a weak spot and then… KABOOM!!!  Deep earthquakes are evidence of the underground activity.