In what year was the last major volcanic eruption in the USA?
1980
1857
1857
1857
1857
1857
1857
1857
1857
1902
1857
1902
1857
1980
1902
1857
1980
1902
1980
1912
1857
1980
1915
1904
2008
1902
1854
1912
1859
1857
1980
1908
2008
1915
1904
1907
1902
1854
1912
1859
1880
1857
1980
2008
1908
1875
1915
1904
1907
1902
1980
1854
1912
1859
1857
2008
1880
1894
2000
1908
1980
1915
1904
2008
1902
1854
1912
1859
1857
1875
2000
1907
1980
2008
1790
1915
1904
1902
1899
1854
1912
1859
1880
2000
1908
1857
1980
1991
2008
1894
1895
1875
1915
2000
1904
1907
1902
1980
1912
1991
1857
2008
1790
2010
1899
1866
1854
1859
1880
1894
2000
1908
1980
1991
2008
1902
1912
2010
1895
1857
1875
1915
2000
1904
1907
1980
1854
1991
2008
1790
2010
1896
1902
1899
1866
1912
1859
1898
1880
2000
1908
1857
1857.
1980
1991
2017
2008
2018
1894
2010
1895
1889
1875
1915
1983
2000
1904
1907
1902
1980
1991
2017
2008
1790
1857.
2018
2010
1883
1896
1899
1866
1854
1880
1867
1983
2000
1908
1980
1991
2017
2008
1902
1872
1912
2009
2012
1859
1898
2018
1894
2010
1895
1889
1979
1875
1983
2000
2014
1857.
1980
1991