<P> St. Helens produced an additional five explosive eruptions between May and October 1980 . Through early 1990 at least 21 periods of eruptive activity had occurred . The volcano remains active , with smaller , dome - building eruptions continuing into 2008 . </P>
<P> St. Helens produced an additional five explosive eruptions between May and October 1980 . Through early 1990 at least 21 periods of eruptive activity had occurred . The volcano remains active , with smaller , dome - building eruptions continuing into 2008 . </P>
when did mt st helen 's last erupt
when did mt st helen 's last erupt
2008
2008