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Epicenters of recent earthquakes south of Hekla
Tuesday, Apr 14, 2015
Small earthquake swarms occurred at shallow depths during the past days near the volcano. The quakes were located approx. 6-10 km south of Hekla volcano and at shallow depths around 5 km. ... [more]
Earthquakes in southern Iceland during the past 48 hours
Monday, Apr 14, 2014
A shallow (around 8 km depth) earthquake swarm including two quakes at 2.7 and 2.9 magnitude has started in an area 12 km to the south of Hekla volcano. ... [more]
 

Hekla volcano

stratovolcano 1491 m (4,892 ft)
Iceland, 63.99°N / -19.67°W
Current status: restless (2 out of 5)
Hekla webcams / live data
Last update: 14 Apr 2015 (seismic unrest)
Typical eruption style: Explosive and effusive.
Hekla volcano eruptions: 1104 (large, Plinian eruption), 1158, 1206, 1222, 1300, 1341, 1389, 1440(?), 1510, 1554, 1597, 1636-37, 1693, 1725, 1766-68, 1845-46, 1878, 1913, 1947-48, 1970, 1980, 1981, 1991, 2000 Hekla in eruption in March 2000 with the large black lava flow in the foreground from that eruption.
TimeMag. / DepthDistanceLocation
Sun, 30 Aug
Sun, 30 Aug 07:17 UTCM 0.4 / 7.4 km8 km8.4 km SW of Vatnafjöll
Sun, 30 Aug 04:48 UTCM 0.6 / 25 km1 km6.4 km NNE of Hábunga
Sun, 30 Aug 04:21 UTCM 0.0 / 0.1 km10 km1.0 km SW of Goðabunga
Sun, 30 Aug 02:55 UTCM 0.2 / 0.7 km5 km4.5 km E of Hekla
Sun, 30 Aug 01:51 UTCM 0.4 / 7 km5 km9.1 km NNW of Álftavatn
View all recent quakes
1491-m-high Hekla is one of Iceland's most prominent, most known and active volcanoes. It has frequent eruptions that start with an explosive onset producing eruption plumes, then lava fountains and culminate in large lava flows. Most of the volcano's flanks are covered by extensive lava flows from historical eruptions, dating back to 1104 AD. Hekla seen from the air in March 2000, with the active fissure and the recent lava flows visible

Background:

Hekla is located near the southern end of the eastern rift zone. It sits on a rift-transform junction, and has produced basaltic andesites, in contrast to the tholeiitic basalts typical of Icelandic rift zone volcanoes. Hekla's tephras are generally rich in flourine, which is very hazardous to grazing animals.
The elongated shape of the volcano is caused by a 5.5-km-long fissure, Heklugjá, that cuts across the volcano and is often active along its full length during major eruptions. Repeated such eruptions, oblique to most rifting structures in the eastern volcanic zone, have created Hekla's elongated ENE-WSW profile.
Frequent large explosive eruptions during historical times have deposited tephra throughout Iceland and provide important time markers that can be used to date eruptions from other volcanoes in Iceland.

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