Askja

Stratovolcano 1516 m (4,974 ft)
Central Iceland, 65.03°N / -16.75°W
Aktueller Status: unruhig (2 von 5)
Last update: 3 Aug 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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Typische Tätigkeit: explosive + effusive
Ausbrüche: 1797(?), 1875, 1919, 1921, 1922, 1923, 1924(?), 1926, 1938, 1961
Letzte Erdbeben in der Nähe:
ZeitStärke / TiefeEntfernung / Lage
Mittwoch, 17. August 2022 GMT (1 Beben)
17. Aug. 2022 20:20 (GMT +0) (17. Aug. 2022 20:20 GMT)
1.7

2.1 km
22 km (14 mi)
Iceland: 10.4 Km WNW of Lokatindur
Samstag, 13. August 2022 GMT (3 Beben)
13. Aug. 2022 15:41 (GMT +0) (13. Aug. 2022 15:41 GMT)
2.1

4.6 km
22 km (14 mi)
Iceland: 9.2 Km NW of Lokatindur
13. Aug. 2022 15:41 (GMT +0) (13. Aug. 2022 15:41 GMT)
1.5

7.8 km
22 km (14 mi)
Iceland: 9.6 Km WNW of Lokatindur
13. Aug. 2022 03:03 (GMT +0) (13. Aug. 2022 03:03 GMT)
1.5

2.9 km
1.4 km (0.9 mi)
Iceland: 8.4 Km W of Dreki
Dienstag, 9. August 2022 GMT (1 Beben)
9. Aug. 2022 03:32 (GMT +0) (9. Aug. 2022 03:32 GMT)
1.7

0.8 km
22 km (14 mi)
Iceland: 9.0 Km NW of Lokatindur

Beschreibung

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

Askja Fotos

Viti crater and lake Öskjuvatn fill only a part of the enormous Askja caldera in Iceland. (Photo: Janka)
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)
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)
View on the exceptionally clear waters of lake Öskjuvatn, Askja caldera, Iceland (Photo: Janka)
 



Siehe auch: Sentinel hub | Landsat 8 | NASA FIRMS

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