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Reykjanes volcano
Crater rows 230 m / 755 ft
Reykjanes peninsula (SW Iceland), 63.89°N / -22.52°W
Current status: restless (2 out of 5)
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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): earthquakes decrease, but inflation continues

Saturday Feb 08, 2020 11:29 AM | BY: T
Depth vs time of earthquakes beneath Thornbjorn volcano during the past days
Depth vs time of earthquakes beneath Thornbjorn volcano during the past days
Earthquake activity around Thornbjorn volcano has decreased over the past days, but weak inflation, likely caused by magma accumulation at shallow depth, continues.
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. The Icelandic Met Office reported yesterday:
"...Small earthquakes are still being detected in the area. Since the 21st of January over 1500 earthquakes have been located in the area. Most of them are located in a SW/NE line around 2 km NE of Grindavik.
Indications are that the crustal deformation pattern has changed, however uplift is still ongoing. In total the uplift is about 5 cm since the 21st of January. With ongoing uplift we can expect ongoing earthquake activity."
Links / Sources:
Previous news
Sunday, Feb 02, 2020
Earthquakes under the Reykjanes peninsula during the past 7 days
The seismic crisis on the Reykjanes peninsula continues. It shows no signs of weakening, but has intensified during the past days. ... read all
Monday, Jan 27, 2020
InSAR data showing inflation. Credit: IMO.
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. read all
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. read all
Friday, Aug 31, 2012
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)
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. read all
Wednesday, Feb 08, 2012
Location of the seismic swarm on 8 Feb 2012 (Icelandic Met Office)
A seismic swarm has occurred on the Reykjanes Ridge 70 km offshore the SW tip of Iceland. About 40 earthquakes with magnitudes mostly between 2 and 3 were recorded. The Reykjanes Ridge is part of the active SW rift zone running through the western part of Iceland. read all

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