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Grímsvötn volcano
Caldera 1725 m (5,659 ft)
Iceland, 64.42°N / -17.33°W
Current status: normal or dormant (1 out of 5)
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Grímsvötn volcano eruptions:
ca. 1310, 1332, 1341, 1354(?), ca. 1370, ca. 1390, ca. 1430, ca. 1450, ca. 1470, ca. 1490, ca. 1510, ca. 1530, 1598, 1603, 1619, 1629, 1638, 1659, 1681, 1684-85, 1706, 1716, 1725, 1753, 1768, 1774, 1783-85 (Laki fissure eruption: the largest historically known effusive eruption), 1794(?), 1796(?), 1816, 1823, 1838, 1854, 1861(?), 1867, 1873, 1883, 1887-89, 1891-92, 1897, 1902-04, 1922, 1933, 1934, 1934, 1938, 1939(?), 1941(?), 1945, 1948(?), 1954, 1972(?), 1983, 1984(?), 1996, 1998, 2004 (Nov.), 2011 (21-26 May)
Typical eruption style:
Effusive, explosive magma-water/ice reaction. 
Produces notorious and frequent floods of melt-water bursts from the glacier (jökulhlaups).
Last earthquakes nearby
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News from Grímsvötn volcano, Iceland:

Grímsvötn volcano (Iceland), eruption warning - increased meltwater

Monday Nov 01, 2010 23:14 PM |

Grímsvötn volcano on Iceland might be heating up to a new eruption. Recently, it has been observed that the amount of glacial meltwater from Grímsvötn emerging from under the thick ice cap of Vatnajökull covering the massive volcano has doubled.
While this might well be caused by heating of the volcano due to rising magma leading to a new eruption, Icelandic volcanologist say that seismicity under the volcano is still low. There are other possible caused that could explain the increase in melt water outflow, such as geomorphical changes in the drainage system allowing an increased discharge of accumulated meltwater on top of the volcano.
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