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Diaporama

Actualités:

Recent earthquakes under Herdubreid volcano
Monday, Oct 12, 2015
A shallow earthquake swarm has been occurring 25 km NE of the Aksja caldera since Thursday. ... [details]
Wednesday, Jul 23, 2014
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. ... [details]
 

Askja volcan

Stratovolcano 1516 m (4,974 ft)
Central Iceland, 65.03°N / -16.75°W
Condition actuelle: normal / en sommeil (1 sur 5)
Askja webcams / données en temps réel | Reports
Askja livres | Tours
Last update: 2 Oct 2018 (earthquake swarms)
Style éruptif tipique: explosive + effusive
Eruptions du volcan Askja : 1797(?), 1875, 1919, 1921, 1922, 1923, 1924(?), 1926, 1938, 1961
HeureMag. / DepthDistanceLocation
Sun, 21 Jul 2019
Sun, 21 Jul 08:42 UTCM 0.3 / 5.8 km15 km3.6 km WSW of Herðubreiðartögl (Iceland)
Thu, 18 Jul 2019
Thu, 18 Jul 14:15 UTCM 0.4 / 11.7 km28 km2.2 km SE of Trölladyngja (Iceland)
Thu, 18 Jul 06:05 UTCM 1.0 / 4.3 km22 km3.0 km SW of Herðubreið (Iceland)
Thu, 18 Jul 06:05 UTCM 0.8 / 5.2 km21 km3.8 km SW of Herðubreið (Iceland)
Thu, 18 Jul 03:51 UTCM 0.5 / 5 km20 km4.5 km SW of Herðubreið (Iceland)
Voir tous
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.

Introduction:

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.

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Source: GVP, Smithsonian Institution

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