Mt.St Helens By Blowoberry Mar 27, 1980 First small eruption It happened on march 27 12:30 Apr 24, 1980 Find bulge on the side of Moutains. May 1, 1980 Bulge on the side of Mt St.Helens. The bulge on the side of the mountain keeps growing. May 18, 1980 Mt. St helens exploded May 18, 1980 Helicopter starts a search for any survivors 3 hrs after the explotion May 18, 1980 People go back to their homes.