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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]
Strain and earthquakes under Hekla volcano (Iceland Met Office)
Thursday, Mar 27, 2014
The volcano remains restless, but without any indication of an impending eruption (however, it is notorious for not giving much warning either). ... [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 2014
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
Tue, 2 Sep
Tue, 2 Sep 08:06 UTCM 1.2 / 8.1 km15 km14.3 km ESE of Árnes
Tue, 2 Sep 02:22 UTCM 1.5 / 1.1 km12 km2.8 km WNW of Goðabunga
Mon, 1 Sep
Mon, 1 Sep 10:16 UTCM 0.7 / 1.1 km11 km6.9 km NNE of Goðabunga
Mon, 1 Sep 05:51 UTCM 0.2 / 5.8 km14 km5.4 km NW of Goðabunga
Sun, 31 Aug
Sun, 31 Aug 23:06 UTCM 1.8 / 4.3 km2 km7.8 km N of Hábunga
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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