based on "Volcanoes of the World", 1994
-6690 -3730 -2985+/-500 -2240 -2140 -1975+/-150 -1810+/-200 -1080 - 670 110 330 1558 damage? 1562 1575 cited as eruption in many sources, but has been a destructive earthquake without erup- tion 1594 1640 03 Feb damage by mudflows 1647 13 May uncertain 1657 15 Mar uncertain 1688 1716 1730 08 Jul 1737 24 Dec 1742 1745 1751 14 Dec lava flow 1759 -- Dec 1777 1780 1787 lava flow 1790 1792 1796 1799 1801 1806 1815 - 1818 1822 19 Nov 1832 24 Dec 1837 07 Nov - 1837 21 Nov 1852 uncertain 1853 -- Nov lava flow 1859 19 May - 1860 12 Apr 1864 -- Oct 1867 - 1868 uncertain 1869 04 Feb - 1870 24 Feb (+/-4 days) 1874 -- Apr 1875 17 Nov - 1876 1877 12 May 1879 02 Feb 1883 1893 - 1894? 1897 - 1898? 1904 1906 22 Apr 1907 10 May - 1907 26 May 1908 31 Oct - 1908 21 Dec violent explosive activity with lava emission and lahars 1909 19 Aug mudflows 1910 uncertain 1913 no eruption! 1915 - 1918? 1919 uncertain 1920 10 Dec - 1920 13 Dec lava flows and lahars 1921 10 Oct lava flows 1929 27 Dec increased fumarolic activity only 1933 05 Jan 1935 1938 11 Feb 1948 09 Oct - 1949 03 Feb lava effusion and lava pond activity followed by violent explosive activity (about 50 killed, and widespread damage) in October 1948, two more paroxysms on 1 and 31 Jan 1949 1950 uncertain 1958 06 Nov - 1959 21 Dec occasional explosions from summit pit crater 1960 - 1961 uncertain 1963 25 Feb - 1964 03 Mar cinder cone builds in summit crater, lava out- flow cuts channel in glacier; more vigorous ac- tvity in May 1963 causes destructive lahars; ac- tivity during the following 10 months is poorly documented but may have continued intermit- tently; renewed lava effusion in Feb 1964 fol- lowed by violent explosions on 1-2 Mar: lahars destroy part of Coñaripe village and kill 25 1971 29 Oct - 1972 10 Jan effusive activity in Nov-Dec 1971 cuts channel into glacier; paroxysmal eruption on 29-30 Dec from fissure across summit causes rapid melting of snow and glaciers with resulting davastating lahars: widespread damage, and at least 15 killed; lava flows reach up to 15 km from summit 1972 and following years weak Strombolian activity from small vent at crater floor 1977 21 Jan - 1977 30 Jan 1980 20 Jun - 1980 24 Sep 1983 14 Oct - 1983 16 Oct 1984 11 Aug - 1985 18 Apr mainly effusive activity accompanied by minor Strombolian activity; cinder cone growth in the summit crater and lava cuts channels into icecap; stronger explosive activity after late Dec 1984, most notably in early Feb 1985 1985 - present (late 1996) persistent lava pond within summit pit crater, oc- casional periods of stronger activity building small cinder cones and phreatic ash emissions
Page set up on 27 October 1996, last modified on 27 October 1996