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Askja volcano

Updated: Dec 3, 2022 20:31 GMT -
Stratovolcano 1516 m (4,974 ft)
Central Iceland, 65.03°N / -16.75°W
Current status: restless (2 out of 5)
Last update: 9 Nov 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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Typical eruption style: explosive + effusive
Askja volcano eruptions: 1797(?), 1875, 1919, 1921, 1922, 1923, 1924(?), 1926, 1938, 1961

Latest nearby earthquakes

TimeMag. / DepthDistance/Location
Saturday, December 3, 2022 GMT (1 quake)
Dec 3, 2022 4:36 am (GMT +0) (Dec 3, 2022 04:36 GMT)
2.4

4.2 km
3.7 km (2.3 mi)
Iceland: 3.8 Km WSW of Dreki
Thursday, December 1, 2022 GMT (2 quakes)
Dec 1, 2022 9:44 pm (GMT +0) (Dec 1, 2022 21:44 GMT)
2.5

5.4 km
22 km (14 mi)
Iceland: 3.3 Km WSW of Herðubreið
Dec 1, 2022 9:20 pm (GMT +0) (Dec 1, 2022 21:20 GMT)
2.7

7.2 km
20 km (12 mi)
Iceland: 4.8 Km N of Herðubreiðartögl
Saturday, December 3, 2022 GMT (1 quake)
Dec 3, 2022 4:36 am (GMT +0) (Dec 3, 2022 04:36 GMT)
2.4

4.2 km
3.7 km (2.3 mi)
Iceland: 3.8 Km WSW of Dreki
Thursday, December 1, 2022 GMT (2 quakes)
Dec 1, 2022 9:44 pm (GMT +0) (Dec 1, 2022 21:44 GMT)
2.5

5.4 km
22 km (14 mi)
Iceland: 3.3 Km WSW of Herðubreið
Dec 1, 2022 9:20 pm (GMT +0) (Dec 1, 2022 21:20 GMT)
2.7

7.2 km
20 km (12 mi)
Iceland: 4.8 Km N of Herðubreiðartögl

Background

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 Photos




See also: Sentinel hub | Landsat 8 | NASA FIRMS

Wed, 9 Nov 2022, 15:00

Askja volcano (Iceland) - Smithsonian / USGS Weekly Volcanic Activity Report for 2 November-8 November 2022 (Continuing Activity)

On 9 November Icelandic Meteorological Office (IMO) lowered the Aviation Color Code for Askja to Green (the lowest level on a four-color scale) noting that although deformation data indicted continuing magma accumulation at depth, with a total uplift of 40 cm since August 2021, it was not accompanied by elevated seismicity. ... Read all
Wed, 3 Aug 2022, 14:00

Askja volcano (Iceland) - Smithsonian / USGS Weekly Volcanic Activity Report for 27 July-2 August 2022 (New Activity / Unrest)

On 27 July IMO stated that uplift at Askja began in August 2021 and since then had totaled 35 cm, centered in the W part of Askja lake. The uplift was rapid, compared to similar volcanoes around the world, and likely caused by a magmatic intrusion at an estimated depth of 2 km. Seismicity remained low. ... Read all
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