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Reykjanes volcano
Crater rows 230 m / 755 ft
Reykjanes peninsula (SW Iceland), 63.89°N / -22.52°W
Current status: normal or dormant (1 out of 5) | Reports
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Reykjanes volcano eruptions:
1211, 1226
Typical eruption style:
effusive (lava flows)
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Reykjanes volcano news & activity updates

Mt. Thorbjorn volcano (Reykjanes peninsula, Iceland) activity update: seismic swarm recorded

Tuesday Feb 18, 2020 09:19 AM | BY: MARTIN

The Icelandic Met Office (IMO) recorded an earthquake swarm since 15 February at the southwestern tip of the Reykjanes peninsula. Over 120 earthquakes were detected by the seismic network with magnitude below M 3.0.
Earthquake activity around Thornbjorn volcano has decreased over the past days but is still above average, less than when it peaked in the end of January.
Additional monitors have been installed around Thorbjorn. Gas will be monitored regularly and scientists recommend the continuing monitoring of the area.
Icelandic scientists measured that in some places about 5 cm ground uplift have taken place since the start of the seismic crisis and that the intrusion is likely located at 3-5 km depth in an area just west Thornbjorn.
Source: Icelandic Met Office volcano activity update 18 February 2020
Previous news
Depth vs time of earthquakes beneath Thornbjorn volcano during the past days
Saturday, Feb 08, 2020
Earthquake activity around Thornbjorn volcano has decreased over the past days, but weak inflation, likely caused by magma accumulation at shallow depth, continues. ... [more]
Earthquakes under the Reykjanes peninsula during the past 7 days
Sunday, Feb 02, 2020
The seismic crisis on the Reykjanes peninsula continues. It shows no signs of weakening, but has intensified during the past days. ... [more]
InSAR data showing inflation. Credit: IMO.
Monday, Jan 27, 2020
IMO reports: An inflation has been detected since January 21st and is centred just west of Mt. Thorbjorn on Reykjanes peninsula. The inflation is unusually rapid, around 3-4 mm per day and has accumulated to 2 cm to date. It has been detected both on continuous GPS stations and in InSAR images. The inflation is most likely a sign of magma accumulation at a depth of just a few km. If magma accumulation is causing the inflation, the accumulation is very small, with the first volume estimate is around 1 million cubic meters. ... [more]

Sunday, Oct 13, 2013
A shallow (10 km) magnitude 4.8 earthquake with many pre- and aftershocks (or a seismic swarm) occurred this morning (Sun) at 07:34 UTC at the SW tip of the Reykjanes peninsula, on the SW active rift zone. The swarm of earthquakes included several quakes of magnitude 3 and higher. The strongest earthquake was widely felt in SE Iceland. ... [more]
Earthquakes on and around Iceland on 30 Aug - the Kolbeinsey Ridge is the area with the yellow dots to the north (map: Icelandic Met Office)
Friday, Aug 31, 2012
Yesterday, there was a lot of earthquake activity on Iceland. At noon, a swarm with about 50 quakes partly preceded and followed a magnitude 4.2 quake at 5.8 km depth beneath the Reykjanes peninsula, near the axis of the the SW volcanic rift zone. Most quakes were between magnitudes 1-2 and at around 5 km depth. ... [more]
 

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