Þorbjörn
| Þorbjörn | ||
|---|---|---|
 Þorbjörn behind the Blue Lagoon bath (Bláa Lónið) |
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| height | 243 m | |
| location | Iceland | |
| Coordinates | 63 ° 51 '52 " N , 22 ° 26' 19" W | |
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| Type | Palagonite back | |
| rock | predominantly palagonite | |
| Age of the rock | Vistula glacial period | |
| Last eruption | (active) | |
| Normal way | Jeep runway from the south side | |
 Þorbjörn behind the place Grindavík , clearly recognizable the crevice running over the summit |
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The Þorbjörn or Þorbjarnarfell is a volcanic mountain in Iceland . It is located on the Reykjanes peninsula in the south-west of the country not far from the fishing village of Grindavík and is 243 meters high.
Svartsengi volcanic system
Þorbjörn itself dates from the last ice age and is made of palagonite . But traces of current geothermal energy can be seen on its slopes in the northeast. This is explained by the fact that it belongs to the high temperature area and volcanic system of Svartsengi . This volcanic system is one of the most famous in Iceland. It fed one of the first geothermal power plants in the country and thereby also the world-famous Blue Lagoon , the geothermal bath, which is supplied with hot water by the geothermal power plant. From here you can see the mountain in front of you.
Traces of plate displacement
It is also of geological interest that the mountain is split, not by volcanic influences, but by a narrow rift that is related to the plate shifts in Iceland.
Tectonic Activities 2020
From January 21, 2020, ground elevations of 3 to 4 mm were measured daily just west of Þorbjörn, which indicate a magma accumulation at a depth of a few kilometers. At the same time, swarm tremors occurred there . The color code of the volcano alarm system for aviation has been raised from green to yellow for Reykjanes to be on the safe side. By February 6, the ground elevation reached about 5 cm and continued, but with a declining number of quakes. After a temporary standstill at the end of February, the uplift continued in March, albeit at a reduced rate, as did the earthquake activity.
See also
Individual evidence
- ↑ cf. Thor Thordarson, Armann Hoskuldsson: Iceland. Classic Geology in Europe 3. Harpenden 2002, p. 69
- ↑ Ari Trausti Guðmundsson : Living Earth. Facets of the geology of Iceland. Reykjavík (Mál og Menning) 2007, p. 136
- ^ Island Met Office, January 26, 2020
- ^ Island Met Office, February 7, 2020
- ^ Island Met Office, March 19, 2020