When was the first eruption of Mount Saint Helens?
18-May-80
May 18, 1980
May 18, 1980
May 18, 1980
1857
March 18, 1980
1857
1866
1857
May 18, 1894
1866
May 18, 1980
March 18, 1980
1857
May 18, 1866
1866
1857
1866
May 18, 1894
1894
May 18, 1980
March 15, 1980
1857
1866
May 18, 1866
1894
March 18, 1980
May 18, 1857
1857
1866
May 18, 1894
1894
March 21, 1980
March 18, 1894
March 15, 1980
May 18, 1980
1857
1866
May 18, 1866
1894
May 18, 1857
March 18, 1980
1980
1857
1866
March 18, 1866
1894
May 18, 1894
1980
March 21, 1980
March 18, 1894
May 18, 1882
1857
1866
March 15, 1980
May 18, 1857
1894
1980
May 18, 1866
May 18, 1811
May 18, 1898
1898
May 18, 1980
May 18, 1859
May 18, 1889
1857
March 18, 1980
1980
1866
1894
March 18, 1866
May 18, 1894
1898
May 18, 1882
March 18, 1894
1980
March 1894
March 15, 1980
May 18, 1857
1857
1866
March 1882
May 18, 1811
May 18, 1898
1894
May 18, 1866
1898
1980
May 18, 1859
May 18, 1889
March 1894
1857
1866
March 1882
May 18, 1980
1894
1980
May 18, 1882
1859
March 18, 1866
1898
May 18, 1894
March 18, 1980
May 18, 1857
March 15, 1980
March 18, 1894
1889
1857
May 18, 1811
1980
May 18, 1898
1866
March 1894
1857-80
May 18, 1866
1894
May 18, 1854
March 1882
1898
1882
1980
March 21, 1980
1866.
1859
1857
1866
May 18, 1882
March 1894
1894
1857-80
1889
March 1882
May 18, 1980
1898
1861
1980
March 18, 1866
May 18, 1857
May 18, 1894
May 18, 1811
May 18, 1865
May 18, 1898
1866.
March 18, 1894
1857
1882
May 18, 1866
1866
March 15, 1980
March 1865
1894
March 18, 1980
1980
March 1894
1898
1865
March 1882
1857-80
1857
May 18, 1882
1980
1866
March 27, 1980
1866.
1894
March 1865
May 18, 1859
May 18, 1889
May 18, 1857
1859
March 1894
May 18, 1862
1898
March 1882
May 18, 1980
May 18, 1894
1980
1857-80
May 18, 1866
1889
1857
1861
1866
March 18, 1894
March 1866
1894
March 15, 1980
1898
1882
1980
1865
March 1894
May 18, 1882
March 1882
March 13, 1980
March 18, 1980
1866.
1857
1857-80
1866
May 18, 1854