Askja volcan
Mise à jour: 7 août. 2022 15:36 GMT - Refresh
Stratovolcano 1516 m (4,974 ft)
Central Iceland, 65.03°N / -16.75°W
Condition actuelle: en vigilance - niveau agité (2 sur 5)
Central Iceland, 65.03°N / -16.75°W
Condition actuelle: en vigilance - niveau agité (2 sur 5)
Last update: 3 août 2022 (Smithsonian / USGS Weekly Volcanic Activity Report)
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
Derniers séismes proches:
| Heure | Mag. / Profondeur | Distance/Lieu | ||
| vendredi, 5 août 2022 GMT (2 séismes) | ||||
| 5 août 2022 21:00 (GMT +0) (5 août. 2022 21:00 GMT) | 1.3 1 km | 22 km (14 mi) Iceland: 10.4 Km WNW of Lokatindur | ||
| 5 août 2022 12:56 (GMT +0) (5 août. 2022 12:56 GMT) | 1.4 1.9 km | 23 km (14 mi) Iceland: 10.4 Km NW of Lokatindur | ||
| jeudi, 4 août 2022 GMT (1 séisme) | ||||
| 4 août 2022 10:47 (GMT +0) (4 août. 2022 10:47 GMT) | 1.8 8.2 km | 23 km (14 mi) Iceland: 10.3 Km NW of Lokatindur | ||
| mardi, 2 août 2022 GMT (1 séisme) | ||||
| 2 août 2022 23:44 (GMT +0) (2 août. 2022 23:44 GMT) | 1.5 3.8 km | 3.5 km (2.2 mi) Iceland: 3.8 Km WSW of Dreki | ||
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
Askja Photos
Viti crater and lake Öskjuvatn fill only a part of the enormous Askja caldera in Iceland. (Photo: Janka)
Askja caldera with its sulphurous Viti crater and the deep lake of Öskjuvatn in the background, Iceland (Photo: Janka)
View on the exceptionally clear waters of lake Öskjuvatn, Askja caldera, Iceland (Photo: Janka)
See also: Sentinel hub | Landsat 8 | NASA FIRMS
