Thordarhyrna Volcano
Updated: May 3, 2024 10:48 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 | |||
Apr 28, 10:11 am (Reykjavik) | 1.1 3.8 km | 3.6 km W of Grímsfjall | Info | ||
Wednesday, April 24, 2024 GMT (1 quake) | |||||
Apr 24, 07:58 pm (Reykjavik) | 1.6 5 km | 26 km (16 mi) to the N | 13.0 km E of Hamarinn | Info | |
Tuesday, April 23, 2024 GMT (1 quake) | |||||
Apr 23, 10:15 am (Reykjavik) | 1.3 1.5 km | 0.2 km NNE of Grímsfjall | Info | ||
Sunday, April 21, 2024 GMT (1 quake) | |||||
Apr 21, 11:12 pm (Reykjavik) | 1.4 3.4 km | 4.5 km WSW of Grímsfjall | Info | ||
Saturday, April 20, 2024 GMT (2 quakes) | |||||
Apr 20, 11:45 pm (Reykjavik) | 1.7 12 km | 27 km (17 mi) to the N | 5.4 km ENE of Hamarinn | Info | |
Apr 20, 11:47 am (Reykjavik) | 1.7 10.3 km | 27 km (17 mi) to the N | 5.9 km ENE of Hamarinn | 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