In what year was the last major volcanic eruption in the USA?
1980
1883
1883
1893
1905
1893
1883
1980
1902
1905
1893
1980
1912
1902
1905
1883
1893
1980
1783
1912
1902
1980
1905
1908
1883
1893
1979
1903
1915
1980
1912
1902
1783
1905
1908
1979
1883
1893
1879
1980
1903
1915
1912
1979
1902
1905
1908
1883
1893
1980
1879
1903
1783
1979
1915
1912
1902
1980
1905
1908
1883
1893
2021
1979
1989
1903
1915
1980
1912
1902
1886
1879
2018
1905
1908
1979
1883
1893
1989
2021
1980
1903
1915
2018
1904
1912
1979
1902
1989
1905
1908
1883
1893
1980
2021
1896
1886
1879
2018
1895
1970
1979
1989
1912
1902
1980
1903
1905
1908
1883
1881
1893
1991
1915
2018
1970
2021
1979
1989
1990
1907
1980
1855
1889
1904
2017
1912
2010
1991
1902
2018
1905
1970
1979
1883
1893
1989
1990
2021
1985
1896
1886
1879
2011
1980
1865
1895
1978
2017
2010
1991
2018
1970
1912
1979
2005
1902
1989
1903
1905
1990
1891
1908
1985
1883
1881
1893
1972
2011
1980
1978
2017
2010
1991
1981
2018
1970
1979
2005
1876
1907
1915
1989
1855
1889
1988
1990
1985
1972
1902
2011
1980
1905
1978
2017
1883
2016
2010
1893
1991
2020