Thordarhyrna volcano

Updated: Aug 13, 2022 01:01 GMT - Refresh
subglacial volcano 1650 m / 5413 ft
Southern Iceland, 64.27°N / -17.62°W
Current status: normal or dormant (1 out of 5)

Thordarhyrna (Þórðarhyrna) is one of seven active subglacial volcanoes beneath the Vatnajokull glacier in southeastern Iceland. It last has erupted in 1903.

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Typical eruption style: explosive
Thordarhyrna volcano eruptions: 1902-04, 1887, 1823
Lastest nearby earthquakes:
TimeMag. / DepthDistance/Location
Tuesday, August 2, 2022 GMT (1 quake)
Aug 2, 2022 5:08 am (GMT +0) (Aug 2, 2022 05:08 GMT)
1.2

14 km
19 km (12 mi)
Iceland: 22.8 Km NW of Skaftafell
Monday, August 1, 2022 GMT (4 quakes)
Aug 1, 2022 11:31 pm (GMT +0) (Aug 1, 2022 23:31 GMT)
4.7

1.1 km
30 km (19 mi)
Iceland: 19.5 Km ESE of Laki
Aug 1, 2022 11:30 pm (GMT +0) (Aug 1, 2022 23:30 GMT)
0.9

7.2 km
18 km (11 mi)
Iceland: 5.8 Km WSW of Grímsfjall
Aug 1, 2022 6:57 pm (GMT +0) (Aug 1, 2022 18:57 GMT)
1.2

4.7 km
21 km (13 mi)
Iceland: 6.7 Km SE of Hamarinn
Aug 1, 2022 9:30 am (GMT +0) (Aug 1, 2022 09:30 GMT)
1.6

4.4 km
17 km (10.6 mi)
Iceland: 6.1 Km WSW of Grímsfjall

Background

The Thordarhyrna (Þórðarhyrna) central volcano has been moderately active during the past 10,000 years. It is the second and less active central volcano of the Grímsvötn-Laki volcanic system, located about 20 km SW of the more active Grímsvötn central volcano and connected to it by a subglacial mountain ridge.
The volcano has a diameter of 15 km, and is covered by ice 100-600 m thick within the Vatnajökull glacier. The last eruption occurred in 1903 CE. The recent activity has been explosive (phreatomagmatic) basaltic eruptions with tephra volumes ranging from 0.01-1 km3, but several rhyolitic nunataks characterize this volcano. Eruptions are accompanied by jökulhlaups (glacial floods). Being the only second central volcano on a volcanic system with considerable historical volcanic activity, Þórðarhyrna is treated as an independent volcano although the fissure swarm events are shared with the Grímsvötn system.
Source: GVP


See also: Sentinel hub | Landsat 8 | NASA FIRMS
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