Thordarhyrna Volcano
Updated: May 11, 2024 18:52 GMT -
subglacial volcano 1650 m / 5413 ft
Southern Iceland, 64.27°N / -17.62°W
Current status: normal or dormant (1 out of 5)
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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Thordarhyrna volcano eruptions: 1902-04, 1887, 1823
Latest nearby earthquakes
Time | Mag. / Depth | Distance / Location | |||
May 11, 12:31 pm (Reykjavik) | 1.2 5.4 km | 5.6 km W of Grímsfjall | Info | ||
Thursday, May 9, 2024 GMT (1 quake) | |||||
May 9, 05:53 am (Reykjavik) | 1.6 6.7 km | 16 km (9.9 mi) to the NE | 6.7 km WSW of Grímsfjall | Info | |
Tuesday, May 7, 2024 GMT (2 quakes) | |||||
May 7, 03:26 pm (Reykjavik) | 1.4 3.1 km | 20 km (12 mi) to the NE | 2.5 km SW of Grímsfjall | Info | |
May 7, 02:08 pm (Reykjavik) | 1.2 10.5 km | 26.0 km NE of Laki | Info | ||
Monday, May 6, 2024 GMT (1 quake) | |||||
May 6, 08:46 pm (Reykjavik) | 1.1 5.1 km | 5.3 km WSW of Grímsfjall | Info | ||
Sunday, April 28, 2024 GMT (1 quake) | |||||
Apr 28, 10:11 am (Reykjavik) | 1.1 3.8 km | 3.6 km W of Grímsfjall | Info |
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