Unrest in the Bárðarbunga.
The seismic activity in the volcano Bárðarbunga has become stronger in recent months, reported visir.is. After the outbreak in the Holuhraun the seismic activity had gone equally strong, since last September, they have, however, increased steadily, writes the earthquake department of the Icelandic Meteorological Service on their Facebook page. An installed on the crater rim new GPS instrument was moved to December by 6.5 centimeters to the west and to three centimeters in height.
This example suggests that the volcano ausdehne and that again ansammle magma under the volcano. In the published graphic is to be seen, the earthquake of magnitude 3 were more frequent in recent months.
According information from the Meteorological Service of the outbreak had reduced the pressure in the volcano system in Holuhraun, but the measurements led to the conclusion that again ansammle Magma. This does not mean that in the near future are likely to have a Clear open, but will the area monitored intensively.
The geologist Art Trausti Guðmundsson Recalls that is located no conventional magma chamber under the Bárðarbunga. Rather, it is a lateral margin, which fill the subsurface chamber at the end. The lava that had fallen to the earth’s surface in the Holuhraun, but come from a lying in 10 to 12 kilometers deep chamber. At the beginning of the events of 2014, Magma was flowed toward Kistufell, have never reached the Earth’s surface there. In the region there are old cracks, where the movement of tectonic plates develop through tension.
Under the Dyngjujökull and before that there are two deep valleys have recently formed on the report geologist Ásta Rut Hjartardóttir and others in a new journal article. One can clearly see here the interaction of magma pressure, landscape and new and old plans that control the formation of a magma Ganges, explained the geologist.
Bárðarbunga has been very active between the 9th and 15th centuries, and in the 18th century. It is impossible to say when and how it happened in the volcano again to an activity, however, the transition formation and magma accumulation were signs of new unrest period.
January 08, 2016. Bárðarbunga , Iceland :
Source : Icelandrewiew
Photos : Páll Stefánsson, Ragnar Axelsson ( archives)