Thordarhyrna volcano
Updated: Nov 29, 2023 03:01 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 | ||
| Friday, November 24, 2023 GMT (1 quake) | ||||
| Nov 24, 11:47 pm (Reykjavik) (Nov 24, 23:47 GMT) | 1.8 2.6 km | 24 km (15 mi) Iceland: 6.9 Km NW of Grímsfjall | ||
| Thursday, November 23, 2023 GMT (2 quakes) | ||||
| Nov 23, 11:57 pm (Reykjavik) (Nov 23, 23:57 GMT) | 1.9 6.5 km | 27 km (17 mi) Iceland: 2.0 Km NE of Hamarinn | ||
| Nov 23, 09:55 pm (Reykjavik) (Nov 23, 21:55 GMT) | 2.4 0.1 km | 22 km (14 mi) Iceland: 0.3 Km W of Grímsfjall | ||
| Wednesday, November 22, 2023 GMT (1 quake) | ||||
| Nov 22, 11:31 pm (Reykjavik) (Nov 22, 23:31 GMT) | 1.8 1.3 km | 27 km (17 mi) Iceland: 4.2 Km NE of Grímsfjall | ||
| Sunday, November 19, 2023 GMT (1 quake) | ||||
| Nov 19, 09:57 pm (Reykjavik) (Nov 19, 21:57 GMT) | 1.8 3.3 km | 21 km (13 mi) Iceland: 1.1 Km SW 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
