Doesn't mean it's not worrisome! Seismologists have noted that the earth under Mt. St. Helens is still rattling at times following Monday's 4.3 magnitude earthquake, though most of the quakes are too small to be felt. For more details check out the article on the Daily News website here.
Experts contend that the movement is not due to volcanic activity, but that really doesn't make me feel any better about the situation.