The launch of a new GVP website is scheduled for Monday, May 20, 2013.
| Start Date: 1997 Nov 22 | Stop Date: 2011 (in or after) |
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Dating Technique: Historical Records Volcanic Explosivity Index (VEI): 3 Lava Volume: > 3.9 x 107 m3 Tephra Volume: > 2.4 x 106 m3 Area of Activity: 1994 crater |
Eruptive Characteristics:
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| Start Date: 1994 Jul 21 | Stop Date: 1994 Jul 21 |
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Dating Technique: Historical Records Volcanic Explosivity Index (VEI): 1 Tephra Volume: 6 x 105 m3 Area of Activity: West of 1987 explosion crater |
Eruptive Characteristics:
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| Start Date: 1991 Mar 1 | Stop Date: 1991 Oct |
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Dating Technique: Historical Records Volcanic Explosivity Index (VEI): 2 Lava Volume: 1.1 x 107 m3 Tephra Volume: 1.0 x 106 m3 |
Eruptive Characteristics:
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| Start Date: 1988 Jun 15 ± 180 days | |
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Eruption is UNCERTAIN Volcanic Explosivity Index (VEI): 2? |
Eruptive Characteristics:
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| Start Date: 1987 Jul 2 | Stop Date: 1987 Jul 2 |
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Dating Technique: Historical Records Volcanic Explosivity Index (VEI): 1 Area of Activity: East side of summit lava dome |
Eruptive Characteristics:
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| Start Date: 1985 | Stop Date: 1986 Jan 5 ± 4 days |
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Dating Technique: Historical Records Volcanic Explosivity Index (VEI): 1 |
Eruptive Characteristics:
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| Start Date: 1983 Feb 11 | Stop Date: 1983 Feb 15 |
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Eruption is UNCERTAIN Volcanic Explosivity Index (VEI): 1? Area of Activity: (possibly confused with 1982 activity) |
Eruptive Characteristics:
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| Start Date: 1977 Dec | Stop Date: 1982 Jun |
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Dating Technique: Historical Records Volcanic Explosivity Index (VEI): 1 Lava Volume: 1.8 x 105 m3 |
Eruptive Characteristics:
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| Start Date: 1975 Dec 11 (?) | Stop Date: 1976 Jun 20 |
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Dating Technique: Historical Records Volcanic Explosivity Index (VEI): 2 Lava Volume: 1.1 x 108 m3 |
Eruptive Characteristics:
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| Start Date: 1973 Jan 30 | |
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Eruption is UNCERTAIN Volcanic Explosivity Index (VEI): 1 |
Eruptive Characteristics:
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| Start Date: 1963 | Stop Date: 1970 |
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Dating Technique: Historical Records Volcanic Explosivity Index (VEI): 1 |
Eruptive Characteristics:
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| Start Date: 1961 | Stop Date: 1962 Dec 1 ± 30 days |
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Dating Technique: Historical Records Volcanic Explosivity Index (VEI): 1 Lava Volume: 6 x 106 m3 |
Eruptive Characteristics:
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| Start Date: 1957 May 14 | Stop Date: 1960 |
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Dating Technique: Historical Records Volcanic Explosivity Index (VEI): 1 |
Eruptive Characteristics:
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| Start Date: 1941 Apr 15 | |
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Eruption is UNCERTAIN Volcanic Explosivity Index (VEI): 3? |
Eruptive Characteristics:
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| Start Date: 1926 ± 4 years | Stop Date: 1931 (?) |
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Dating Technique: Historical Records Volcanic Explosivity Index (VEI): 1? |
Eruptive Characteristics:
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| Start Date: 1913 Jan 17 | Stop Date: 1913 Jan 24 |
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Dating Technique: Historical Records Volcanic Explosivity Index (VEI): 5 Tephra Volume: 1.7 x 109 m3 |
Eruptive Characteristics:
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| Start Date: 1908 Dec 18 | Stop Date: 1909 Jul 1 ± 30 days |
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Dating Technique: Historical Records Volcanic Explosivity Index (VEI): 3 |
Eruptive Characteristics:
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| Start Date: 1904 | Stop Date: 1906 |
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Dating Technique: Historical Records Volcanic Explosivity Index (VEI): 1? |
Eruptive Characteristics:
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| Start Date: 1903 Feb 15 | Stop Date: 1903 Aug |
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Dating Technique: Historical Records Volcanic Explosivity Index (VEI): 3 |
Eruptive Characteristics:
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| Start Date: 1893 Dec 4 | Stop Date: 1902 |
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Dating Technique: Historical Records Volcanic Explosivity Index (VEI): 2 |
Eruptive Characteristics:
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| Start Date: 1891 Jul | Stop Date: 1892 Jun |
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Dating Technique: Historical Records Volcanic Explosivity Index (VEI): 2 |
Eruptive Characteristics:
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| Start Date: 1890 Nov 18 | Stop Date: Unknown |
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Dating Technique: Historical Records Volcanic Explosivity Index (VEI): 2? |
Eruptive Characteristics:
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| Start Date: 1889 Aug 9 | Stop Date: 1890 Feb 16 |
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Dating Technique: Historical Records Volcanic Explosivity Index (VEI): 4 |
Eruptive Characteristics:
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| Start Date: 1887 | Stop Date: Unknown |
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Dating Technique: Historical Records Volcanic Explosivity Index (VEI): 0 |
Eruptive Characteristics:
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| Start Date: 1885 Dec 26 | Stop Date: 1886 Oct |
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Dating Technique: Historical Records Volcanic Explosivity Index (VEI): 3? |
Eruptive Characteristics:
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| Start Date: 1882 | Stop Date: 1884 |
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Dating Technique: Historical Records Volcanic Explosivity Index (VEI): 1 |
Eruptive Characteristics:
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| Start Date: 1880 Dec 1 ± 30 days | Stop Date: 1881 Apr 12 |
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Dating Technique: Historical Records Volcanic Explosivity Index (VEI): 2 |
Eruptive Characteristics:
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| Start Date: 1879 Dec 23 | Stop Date: 1880 Apr 30 |
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Dating Technique: Historical Records Volcanic Explosivity Index (VEI): 1 Area of Activity: Summit vent and SW flank |
Eruptive Characteristics:
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| Start Date: 1875 | Stop Date: 1878 |
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Dating Technique: Historical Records Volcanic Explosivity Index (VEI): 1 Area of Activity: NE flank (El Volcancito) |
Eruptive Characteristics:
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| Start Date: 1874 Jun 12 | Stop Date: Unknown |
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Dating Technique: Historical Records Volcanic Explosivity Index (VEI): 1 Area of Activity: NE flank (El Volcancito) |
Eruptive Characteristics:
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| Start Date: 1872 Feb 26 | Stop Date: 1873 Mar 27 |
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Dating Technique: Historical Records Volcanic Explosivity Index (VEI): 3 Area of Activity: El Volcancito and main crater |
Eruptive Characteristics:
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| Start Date: 1870 | Stop Date: 1871 |
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Dating Technique: Historical Records Volcanic Explosivity Index (VEI): 0 Area of Activity: NE flank (El Volcancito) |
Eruptive Characteristics:
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| Start Date: 1869 Jun 12 | Stop Date: 1869 Aug 24 (on or after) |
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Dating Technique: Historical Records Volcanic Explosivity Index (VEI): 3 Lava Volume: 2.1 x 108 m3 Area of Activity: NE flank (El Volcancito) |
Eruptive Characteristics:
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| Start Date: 1866 Mar 4 | Stop Date: 1868 |
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Eruption DISCREDITED Area of Activity: (crater filling and overflow discounted) |
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| Start Date: 1819 | Stop Date: Unknown |
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Dating Technique: Historical Records Volcanic Explosivity Index (VEI): 1 |
Eruptive Characteristics:
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| Start Date: 1818 Feb 15 | Stop Date: 1818 Feb 16 (?) |
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Dating Technique: Historical Records Volcanic Explosivity Index (VEI): 4 |
Eruptive Characteristics:
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| Start Date: 1806 | Stop Date: 1809 |
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Dating Technique: Historical Records Volcanic Explosivity Index (VEI): 2? |
Eruptive Characteristics:
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| Start Date: 1804 | Stop Date: Unknown |
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Dating Technique: Historical Records Volcanic Explosivity Index (VEI): 2 |
Eruptive Characteristics:
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| Start Date: 1795 Mar | Stop Date: 1795 Sep |
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Dating Technique: Historical Records Volcanic Explosivity Index (VEI): 2 |
Eruptive Characteristics:
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| Start Date: 1794 Aug | Stop Date: Unknown |
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Dating Technique: Historical Records Volcanic Explosivity Index (VEI): 2 |
Eruptive Characteristics:
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| Start Date: 1780 Nov 26 | Stop Date: Unknown |
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Dating Technique: Historical Records Volcanic Explosivity Index (VEI): 2 |
Eruptive Characteristics:
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| Start Date: 1771 | Stop Date: Unknown |
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Dating Technique: Historical Records Volcanic Explosivity Index (VEI): 3 |
Eruptive Characteristics:
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| Start Date: 1770 Mar 10 | Stop Date: 1770 Mar 12 |
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Dating Technique: Historical Records Volcanic Explosivity Index (VEI): 3 |
Eruptive Characteristics:
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| Start Date: 1769 | Stop Date: Unknown |
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Dating Technique: Historical Records Volcanic Explosivity Index (VEI): 2? |
Eruptive Characteristics:
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| Start Date: 1749 | |
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Eruption is UNCERTAIN Volcanic Explosivity Index (VEI): 2 |
Eruptive Characteristics:
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| Start Date: 1744 | Stop Date: Unknown |
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Dating Technique: Historical Records Volcanic Explosivity Index (VEI): 2 |
Eruptive Characteristics:
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| Start Date: 1743 Oct 22 | Stop Date: Unknown |
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Dating Technique: Historical Records Volcanic Explosivity Index (VEI): 2? |
Eruptive Characteristics:
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| Start Date: 1711 | Stop Date: Unknown |
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Dating Technique: Historical Records Volcanic Explosivity Index (VEI): 3? |
Eruptive Characteristics:
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| Start Date: 1690 | Stop Date: Unknown |
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Dating Technique: Historical Records Volcanic Explosivity Index (VEI): 3? |
Eruptive Characteristics:
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| Start Date: 1622 Jun 8 | Stop Date: 1622 Jun 9 |
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Dating Technique: Historical Records Volcanic Explosivity Index (VEI): 4 |
Eruptive Characteristics:
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| Start Date: 1611 Apr 15 | Stop Date: 1613 |
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Dating Technique: Historical Records Volcanic Explosivity Index (VEI): 3 |
Eruptive Characteristics:
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| Start Date: 1606 Nov 25 | Stop Date: 1606 Dec 13 (on or after) |
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Dating Technique: Historical Records Volcanic Explosivity Index (VEI): 4 |
Eruptive Characteristics:
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| Start Date: 1602 | |
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Eruption is UNCERTAIN Volcanic Explosivity Index (VEI): 2? |
Eruptive Characteristics:
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| Start Date: 1590 Jan 14 | Stop Date: 1590 Jan 15 |
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Dating Technique: Historical Records Volcanic Explosivity Index (VEI): 3 |
Eruptive Characteristics:
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| Start Date: 1585 Jan 10 | Stop Date: Unknown |
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Dating Technique: Historical Records Volcanic Explosivity Index (VEI): 4 |
Eruptive Characteristics:
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| Start Date: 1576 | Stop Date: Unknown |
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Dating Technique: Historical Records Volcanic Explosivity Index (VEI): 3 |
Eruptive Characteristics:
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| Start Date: 1560 | Stop Date: Unknown |
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Dating Technique: Historical Records Volcanic Explosivity Index (VEI): 2 |
Eruptive Characteristics:
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| Start Date: 1519 | Stop Date: 1523 |
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Dating Technique: Historical Records Volcanic Explosivity Index (VEI): 3? |
Eruptive Characteristics:
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| Start Date: 1110 ± 200 years | Stop Date: Unknown |
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Dating Technique: Radiocarbon (corrected) |
Eruptive Characteristics:
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| Start Date: 730 AD ± 100 years | Stop Date: Unknown |
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Dating Technique: Radiocarbon (uncorrected) |
Eruptive Characteristics:
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| Start Date: 540 AD ± 150 years | Stop Date: Unknown |
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Dating Technique: Radiocarbon (corrected) |
Eruptive Characteristics:
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| Start Date: 650 BC ± 200 years | Stop Date: Unknown |
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Dating Technique: Radiocarbon (corrected) |
Eruptive Characteristics:
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| Start Date: 1140 BC (?) | Stop Date: Unknown |
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Dating Technique: Radiocarbon (uncorrected) |
Eruptive Characteristics:
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| Start Date: 1170 BC ± 200 years | Stop Date: Unknown |
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Dating Technique: Radiocarbon (corrected) |
Eruptive Characteristics:
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| Start Date: 1320 BC (?) | Stop Date: Unknown |
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Dating Technique: Radiocarbon (uncorrected) |
Eruptive Characteristics:
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| Start Date: 1450 BC ± 100 years | Stop Date: Unknown |
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Dating Technique: Radiocarbon (uncorrected) |
Eruptive Characteristics:
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| Start Date: 1890 BC ± 75 years | Stop Date: Unknown |
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Dating Technique: Radiocarbon (uncorrected) |
Eruptive Characteristics:
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| Start Date: 1940 BC ± 300 years | Stop Date: Unknown |
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Dating Technique: Radiocarbon (corrected) |
Eruptive Characteristics:
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| Start Date: 2370 BC ± 150 years | Stop Date: Unknown |
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Dating Technique: Radiocarbon (uncorrected) Volcanic Explosivity Index (VEI): 4? Tephra Volume: 3.5 x 108 m3 |
Eruptive Characteristics:
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| Start Date: 2800 BC ± 100 years | Stop Date: Unknown |
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Dating Technique: Radiocarbon (corrected) |
Eruptive Characteristics:
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| Start Date: 3030 BC ± 50 years | Stop Date: Unknown |
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Dating Technique: Radiocarbon (uncorrected) |
Eruptive Characteristics:
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| Start Date: 3180 BC ± 100 years | Stop Date: Unknown |
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Dating Technique: Radiocarbon (corrected) Area of Activity: (tephra units X,Y) |
Eruptive Characteristics:
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| Start Date: 3270 BC (?) | Stop Date: Unknown |
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Dating Technique: Tephrochronology Area of Activity: (tephra unit W) |
Eruptive Characteristics:
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| Start Date: 3350 BC ± 300 years | Stop Date: Unknown |
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Dating Technique: Radiocarbon (corrected) Area of Activity: (tephra unit V) |
Eruptive Characteristics:
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| Start Date: 3510 BC ± 200 years | Stop Date: Unknown |
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Dating Technique: Radiocarbon (corrected) |
Eruptive Characteristics:
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| Start Date: 3600 BC ± 200 years | Stop Date: Unknown |
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Dating Technique: Radiocarbon (corrected) Area of Activity: (tephra unit U) |
Eruptive Characteristics:
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| Start Date: 4110 BC ± 100 years | Stop Date: Unknown |
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Dating Technique: Radiocarbon (corrected) Area of Activity: (tephra unit T) |
Eruptive Characteristics:
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| Start Date: 4430 BC ± 300 years | Stop Date: Unknown |
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Dating Technique: Radiocarbon (corrected) Area of Activity: (tephra units S,R) |
Eruptive Characteristics:
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| Start Date: 4500 BC ± 200 years | Stop Date: Unknown |
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Dating Technique: Radiocarbon (uncorrected) |
Eruptive Characteristics:
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| Start Date: 4960 BC ± 200 years | Stop Date: Unknown |
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Dating Technique: Radiocarbon (uncorrected) |
Eruptive Characteristics:
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| Start Date: 5880 BC ± 200 years | Stop Date: Unknown |
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Dating Technique: Radiocarbon (corrected) Area of Activity: (tephra unit P) |
Eruptive Characteristics:
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| Start Date: 6320 BC ± 200 years | Stop Date: Unknown |
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Dating Technique: Radiocarbon (uncorrected) |
Eruptive Characteristics:
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| Start Date: 7420 BC ± 500 years | Stop Date: Unknown |
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Dating Technique: Radiocarbon (uncorrected) |
Eruptive Characteristics:
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| Start Date: 7690 BC ± 500 years | Stop Date: Unknown |
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Dating Technique: Radiocarbon (uncorrected) |
Eruptive Characteristics:
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