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Hekla Volcano - John Seach
Iceland
63.98 N, 19.70 W
summit elevation 1491 m
stratovolcano
Hekla Volcano is located in southern Iceland. It is built on a 5 km long fissure. Hekla is the most active volcano in Iceland, and one of the world's best known volcanoes.
The magma reservoir feeding Hekla is located at a depth of 5-9 km. During non-eruptive periods the volcano is virtually aseismic. Eruption-related seismicity starts only 30-80 minutes before its onset. Hundreds of small volcano-tectonic earthquakes (magnitude < 3), related to the intrusion of magma, occur during the first hours, when the eruption is violent and explosive.
An eruption in 1104, devastated the inhabited Thjorsardalur valley. The eruption produced 2.5 cubic km of tephra, which was carried towards NNW.
Hekla Volcano Eruptions
2000, 1991, 1981, 1980, 1970, 1947-48, 1913, 1878, 1845-46, 1766-68, 1725, 1693, 1636-37,1597, 1554, 1510, 1389-90, 1341, 1300-01, 1222, 1206, 1158, 1104