When was the last eruption of Mount St. Helens?
2008
May 18, 1980
May 18, 1980
1980
1980
May 18, 1980
1980
1980
1980
1980
21st century
May 18, 1980
May 20, 1980
1980
1980
May 22, 1980
May 18, 1980.
May 18, 1980
March 18, 1980
21st century
1980
May 17, 1980
1980
May 20, 1980
May 18, 1980
20-Mar-08
1980
21st century.
May 22, 1980
21st century
May 18, 2008
May 18, 2012
1980
20-Mar-05
May 18, 1980
May 18, 2017
May 15, 1980
May 18, 2018
March 18, 1980
20-Mar-90
1st May 1980
1980
20-Mar-18
May 18, 1980.
20-Mar-07
20-Mar-09
May 18, 1980
May 18, 2008
May 13, 1980
May 18, 2012
1980
May 20, 1980
May 18, 2017
20-Mar-00
20-Mar-06
May 18, 2018
21st century
20-Mar-80
20-Mar-2017
1980
May 18, 1980
20-Mar-79
May 22, 1980
May 18, 2008
18th-century
May 18, 2012
1980
May 18, 2013
1989
May 18, 2017
1st March 1980
May 15, 1980
1st May 1980
May 17, 1980
15-Mar-08
May 18, 1980
21st century
1980
20th century
1989
21st century.
18th-century
May 18, 1894
May 20, 1980
1st of May
May 18, 2008
May 18, 2018
May 18, 2012
1980
May 18, 2013
21-Mar-08
15-Mar-05
May 18, 1980
1st August 1980
1989
May 18, 2017
21st-century
20-Mar-19
1st June 1980
18th-century.
May 20, 1980.
21-Jun-18
20th century
15-Mar-07
May 18, 1980,
1980
May 22, 1980
18th-century
1989
May 18, 2008
15-Mar-90
15-Mar-09
May 18, 1980.
14-Mar-08
15-Jun-18
May 18, 2018
March 18, 1980.
May 18, 2012
May 18, 2013
May 18, 1983
1st March 1980
15-Mar-18
May 18, 1980
1st May 1980
May 18, 2017
1983
21st Century
1980
1st of May
20th century
May 20, 1980
18th-century.
14-Mar-90
1989
1984
21st century.
15-Jun-17
15-Mar-02
May 18, 2008
1983
14-Mar-05
May 18, 1894
May 18, 2018
1907
May 18, 2012
May 18, 2013
May 18, 1980
21-Mar-18
18th-century
14-Mar-80
1989
14-Mar-79
May 18, 2017
1866
14-Mar-07
1984
1st August 1980
14-Mar-91
1st June 1980
1983
14-Mar-82
May 18, 1984
May 18, 1983
May 18, 2001
1989
May 18, 2008
14-Mar-09
1907
May 18, 1889
1st of May
1984
15-Jun-18
21st Century
May 18, 2018
15-Jun-19
May 18, 2012
May 18, 2013
May 18, 1980,
May 18, 1980
May 18, 2017
14-Mar-18
1983
1904
1st March 1980
1988
May 18, 1980.
1989
1866
1882
May 20, 1980.
1984
20th-century
21st century.
1996
1907
15-Jun-17
May 18, 2008
1983
May 18, 2018
21-Jun-18
1988