When was the last eruption of Mt. St. Helens?
18-May-80
May 18, 1980
May 18, 1980
May 18, 1980
1980
1980
May 18, 1980
1980
1980
21st century
May 20, 1980
May 18, 1980
1980
May 18, 1980.
March 18, 1980
1980
May 22, 1980
21st century
May 18, 1980
1980
May 20, 1980
1980
May 18, 1980.
14-Mar-08
May 18, 2008
May 18, 2012
May 18, 1980
1980
March 18, 1980
May 22, 1980
21st century
May 18, 2017
May 18, 2018
1980
21st century.
14-Mar-05
14-Mar-90
14-Mar-80
May 18, 2008
14-Mar-07
May 18, 2012
May 20, 1980
18th-century
May 18, 1980
14-Mar-79
14-Mar-18
1980
May 18, 2017
May 18, 2018
14-Mar-82
May 18, 1980.
21st century
May 18, 2013
1980
21-Mar-08
21st century.
May 22, 1980
May 18, 1980
18th-century
May 18, 2008
May 18, 2012
March 18, 1980
1st May 1980
1980
May 18, 1894
May 17, 1980
May 18, 2017
May 18, 2018
May 18, 1980
1980
18th-century
21-Mar-05
May 20, 1980
21st century
18th-century.
May 18, 2008
May 18, 2012
21-Mar-07
1980
21-Mar-90
May 18, 1894
21st-century
May 18, 1980
21-Mar-08
May 18, 2013
14-Mar-19
21-Mar-80
May 18, 1980.
May 18, 2017
18th-century
May 18, 2018
18th and 18th
1st of May
21-Mar-18
May 18, 2001
1866
1989
1st March 1980
1980
18th-century.
May 20, 1980
1894
May 18, 2008
May 18, 2012
May 18, 1894
18th and 19th
May 18, 1980
1989
20th century
1980
1866
18th-century
1907
3000 years ago
15-Mar-08
May 18, 2013
21-Mar-05
1882
May 18, 2017
May 18, 2018
18th-century.
May 18, 2001
May 18, 1889
May 18, 1980.
1989
1980
May 18, 2008
21-Mar-18
May 18, 2012
May 20, 1980
21st Century
1894
May 18, 1980
20th century
May 20, 1980.
1907
1857
May 18, 1882
18th-century
May 18, 1980,
1904
1989
May 18, 2013
1980
1984
May 18, 1898
May 18, 2017
May 18, 1894
May 18, 2018
1866
May 18, 2001
May 18, 1899
May 18, 2008
1882
May 18, 2012
1894
18th-century.
May 18, 1889
1983
May 18, 1980
May 18, 1980.
1907
1989
20th century
1857
1980
1984
21-Mar-19
May 20, 1980
1904
May 18, 1984
May 18, 2013
1866
May 18, 1882
1983
1989
1882
May 18, 2008
1984
May 18, 1898
May 18, 2012
18th-September 1980
1907
18th-century.
May 18, 1980
May 18, 1889
1904
May 18, 1894.
May 18, 2017
1996
May 18, 2018
1894
May 18, 2001
1983
May 18, 2000
1866
1989
1857
1984
1991
1988