Question: When did mt st helen's last erupt?
Disambiguated questions and answers: question: When did mt st helen's last eruption end?
When did mt st helen's last eruption begin?
When did mt st helen's last major eruption occur?
answer: July 10, 2008
January 16, 2008
May 18, 1980
Natural Questions answer: 2008 (from the Wikipedia article "1980 eruption of Mount St. Helens")