Askja volcan
Stratovolcano 1516 m (4,974 ft)
Central Iceland, 65.03°N / -16.75°W
Condition actuelle: normal / en sommeil (1 sur 5)
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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Eruptions du volcan Askja: 1797(?), 1875, 1919, 1921, 1922, 1923, 1924(?), 1926, 1938, 1961
Latest nearby earthquakes
| Heure | Mag. / Profondeur | Distance | Location | |
| Fri, 5 Mar 2021 (GMT) (3 earthquakes) | ||||
| 5 Mar 2021 13:09:43 GMT | 1.5 14 km - Plus | 26 km | 5.5 Km NNW of Herðubreið, Iceland | |
| 5 mars 2021 11:21 (GMT +0) (5 Mar 2021 11:21:22 GMT) | 0.6 0.7 km - Plus | 75 km | 2.1 Km WSW of Grímsfjall, Iceland | |
| 5 mars 2021 09:36 (GMT +0) (5 Mar 2021 09:36:20 GMT) | 0.2 12 km - Plus | 19 km | 2.2 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) | 0.5 7.6 km - Plus | 41 km | 6.0 Km NNW of Herðubreiðarfjöll, Iceland | |
| 4 Mar 2021 18:23:46 GMT | 0.1 0.1 km - Plus | 69 km | 13.0 Km E of Hamarinn, Iceland | |
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.---
Source: GVP, Smithsonian Institution
See also: Sentinel hub | Landsat 8
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