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Askja is a large basaltic central volcano that forms the Dyngjufjöll massif. It is truncated by three overlapping calderas, the largest of which is 8 km wide and may have been produced primarily from subglacial ring-fracture eruptions rather than by subsidence.
A shallow earthquake swarm has been occurring 25 km NE of the Aksja caldera since Thursday. ...more
More than 150 small quakes with magnitudes up to 2.2 have so far been recorded, clustered at depths between 3-12 km in 5 km north of the Herðubreið table mountain, an old subglacial volcano 20 km NE of the Askja caldera. Whether the swarm is caused by a magmatic intrusion or something else is not known at the moment.
A large landslide occurred from the southern wall of the Askja caldera yesterday night. The slide caused a large flood wave in the Öskjuvatn lake that also swept into the famous Viti crater. ...more
There are no reports of victims. Although there have been speculations that the slide could have been triggered by magmatic processes, it is most likely a result of summer warming, melting frozen soil in the caldera walls, destabilizing it. [less]
Location of the recent earthquakes near Askja (Iceland)
A swarm of shallow earthquakes at 2-10 km depth has started under the Herðubreið volcano about 12 km NE of the Askja caldera. The largest earthquakes so far were 2 magnitude 3.2 and 3.0 events. ...more
Whether the earthquakes are caused by intruding magma at shallow depth, and could be a potential precursor to a new eruption of the volcano, is at present unknown. [less]
A small swarm of earthquakes has occurred today under the eastern caldera rim. Another minor swarm took place yesterday under Þórðarhyrna volcano 20 km to the NE.
A swarm of earthquakes at shallow depths, mostly around 2-5 km has been occurring in an area about 12 km NE of the caldera. 27 quakes including 6 between magnitudes 2.1-2.7 were recorded yesterday.
Time and depth of recent quakes at Askja volcano on Iceland
During the past days, an increased number of earthquakes occurred in an area east of the Askja caldera. The corresponding tremor signal has been rising as well, although these levels seem not to be alarming.
Location of recent quakes (Sep 2012) at and near Askja volcano
An increased number of earthquakes can be noted beneath Askja volcano during recent weeks. A shallow M2 quake occurred early this morning at 07:29 GMT.
Earthquake swarm near the Askja caldera on 14-15 May 2012 (Icelandic Met Office)
A small seismic swarm occurred on 14-15 May near the Askja caldera in central Iceland, just southwest of Herðubreið volcano. ...more
Herðubreið volcano, located in the Highlands of Iceland in the midst of the Ódáðahraun desert, is an isolated, table-mountain shaped broad cone that formed beneath the icesheet that covered Iceland during the last ice age, which is when the volcano had its last eruption. Whether the recent seismic swarm is related to the same magmatic system that formed Herðubreið or rather to the larger Askja caldera volcano is difficult to asses. [less]
Some news has appeared about a sudden warming of the Askja volcano caldera lake. It seems that a melt of ice in the caldera lake started in the beginning of March and by the end of March, the lake was completely ice free. ...more
This is highly unusual and it is not known to have happened before. Such increase in hydrothermal activity is probably caused by a heat source at the bottom of the lake, although so far, there are no other changes visible around Lake Askja. Hydrothermal areas around Askja are active recent reports confirm. Whether the raised temperature of Askja lake is a precursor to a new eruption in the foreseeable future is speculation at this point. [less]
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Current activity of Bardarbunga volcano, Iceland: An intense seismic crisis started at Bárdarbunga volcano on 16 August 2014 and is continuing at the time of writing (23 Aug). It may or may not lead to a volcanic eruption, possibly under the Vatnajökull ice cap.
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