Mount St. Helens has recently experienced a series of small earthquakes that have some people speculating it may erupt again soon. It's been almost exactly 36 years since it last erupted on May 18, 1980. If you'd like to keep an eye on the volcano to make sure you don't miss anything exciting, the U.S. Forest Service provides this handy "VolcanoCam" which allows you to see "near real-time" images:
it does erupt, please keep in mind that you'll likely need to seek
permission from the Forest Service in order to use the volcano for
sacrificing virgins or disposing of evil jewelry.