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lun., 11 nov. 2019, 07:35
The ongoing earthquake swarm at the Askja caldera in Iceland
An swarm of earthquakes is occurring near the Askja caldera, in an area approx. 10 km ENE from the rim and at depths around 5 km. ... lire toutes
lun., 12 oct. 2015, 09:21
Recent earthquakes under Herdubreid volcano
A shallow earthquake swarm has been occurring 25 km NE of the Aksja caldera since Thursday. lire toutes

Askja volcan

Stratovolcano 1516 m (4,974 ft)
Central Iceland, 65.03°N / -16.75°W
Condition actuelle: normal / en sommeil (1 sur 5)
Last update: 1 Mar 2020 (earthquake swarm ENE of the caldera)

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.

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Style éruptif tipique: explosive + effusive
Eruptions du volcan Askja: 1797(?), 1875, 1919, 1921, 1922, 1923, 1924(?), 1926, 1938, 1961

Latest nearby earthquakes

HeureMag. / ProfondeurDistanceLocation
Fri, 5 Mar 2021 (GMT) (3 earthquakes)
5 Mar 2021 13:09:43 GMT

14 km - Plus
26 km5.5 Km NNW of Herðubreið, Iceland
5 mars 2021 11:21 (GMT +0) (5 Mar 2021 11:21:22 GMT)

0.7 km - Plus
75 km2.1 Km WSW of Grímsfjall, Iceland
5 mars 2021 09:36 (GMT +0) (5 Mar 2021 09:36:20 GMT)

12 km - Plus
19 km2.2 Km N of Herðubreiðartögl, Iceland
Thu, 4 Mar 2021 (GMT) (2 earthquakes)
4 mars 2021 21:11 (GMT +0) (4 Mar 2021 21:11:29 GMT)

7.6 km - Plus
41 km6.0 Km NNW of Herðubreiðarfjöll, Iceland
4 Mar 2021 18:23:46 GMT

0.1 km - Plus
69 km13.0 Km E of Hamarinn, Iceland


A major rhyolitic explosive eruption from Dyngjufjöll about 10,000 years ago was in part associated with the formation of Askja caldera. Many postglacial eruptions also occurred along the ring-fracture. A major explosive eruption on the SE caldera margin in 1875 was one of Iceland's largest during historical time. It resulted in the formation of a smaller 4.5-km-wide caldera, now filled by Öskjuvatn lake, that truncates the rim of the larger central caldera. The 100-km-long Askja fissure swarm, which includes the Sveinagja graben, is also related to the Askja volcanic system, as are several small shield volcanoes such as Kollatadyngja. Twentieth-century eruptions at Askja have produced lava flows from vents located mostly near Öskjuvatn lake.

Source: GVP, Smithsonian Institution

See also: Sentinel hub | Landsat 8

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