When was the first eruption of Mount Saint Helens?
18-May-80
1883
1893
1883
1893
1980
1883
1893
1980
1880
1883
1905
1893
1980
1855
1880
1300 BC
1883
1980
1905
1893
1855
1880
1980
1883
1890
1905
1893
1879
1855
1980
1300 BC
1880
1889
1883
1890
1905
1893
1895
1980
1879
1855
1200 BC
1880
1889
1883
1872
1896
1890
1980
1905
1893
1855
1300 BC
1880
1886
1895
1980
1879
1883
1890
1905
1200 BC
1893
1889
1855
1700 BC
1859
1100 BC
1872
1980
1880
1883
1891
1896
1908
1905
1886
1893
1980
1870
1300 BC
1895
1912
1879
1855
1883
1890
1700
1980
1893
1300 AD
1889
1859
1872
1891
1200 BC
1700 BC
1880
1100 BC
1970
1980
1883
1896
1908
1700
1871
1905
1893
1300 AD
1970
1980
1886
1882
1895
1912
1879
1883
1300
1908
1700
1902
1905
1870
1970
1893
1980
1100 AD
1300 AD
1912
1897
1889
1855
1883
1700 BC
1859
1300
1970
1908
1890
1700
1980
1902
1905
1880
1872
1891
1896
1871
1886
1970
1912
1980
1960
1100 AD
1300
1908
1300 AD
1700
1902
1905
1870
1893
1882
1895
1879
1970
1980
1960
1912
1897
1889
1855
1883
1859
1300
1872
1894
1891
1908
1890
1700
1902
1905
1903
1700 BC
1880
1870 BC
1896
1200
1300
1864
1871
1860
1903
1892
1886
1893
1882
1904
1200