Öraefajökull volcano news & activity updates
Öraefajökull volcano (Iceland): seismic activity still elevated
Friday Jan 19, 2018 10:13 AM | DOOR: T
Location of yesterday's 3.1 earthquake under Öraefajökull volcanoA magnitude 3.1 earthquake occurred yesterday under the northern caldera of the volcano. Its very shallow depth (given as 100 m) suggests that it is most likely caused by adjustments of the glacier and not by a magma intrusion.
However, seismic activity at the volcano remains above background and it is being monitored by the Icelandic Met Office (IMO). There are currently no signs that activity is increasing towards new volcanic activity in a near future.
In December, IMO announced the that "real-time surveillance around Öræfajökull has been improved to better monitor the seismicity (significantly increased since September this year) and the release of geothermal water from the caldera (detected the first time in mid-November).
"... Most of the seismicity is located close to the caldera and at a depth between 2-10 km (the depth has a fairly large uncertainty).
Recent hydrological and geochemical measurements suggest a smaller proportion of geothermal water to be released in Kvía river which seems to have reached its maximum in December.
"Estimates of the geothermal power beneath the volcano, as assessed by the temporal changes on the ice-surface are not suggesting an increase. There are no clear indications that water is accumulating beneath the ice in the cauldron and, given the trend of the activity until now, it is unlikely to expect a flood in the next months. However, it is very important to keep following this process with regular measurements of the caldera and the ice-surface deformation.
"When considering all these data together, the interpretation is that the activity in Öræfajökull has been fairly stable over the last weeks without showing acceleration in the process. But it is considered too early to conclude that the activity is decreasing. For this reason the Icelandic Meteorological Office keeps the YELLOW level for the Aviation Color Code at Öræfajökull as the current status is still considered above the know background conditions." (IMO)
Koppelingen / Bronnen:
Koppelingen / Bronnen:
- Monitoring Öræfajökull – update 22. Dec. 2017 (IMO)
Wednesday, Sep 28, 2011
Iceland's tallest volcano, the large sub-glacial Öraefajökull volcano under Vatnajökull glacier on the SE tip of Iceland has been showing an unusual number of earthquakes over the past weeks, rising some concern that the volcano might erupt again. ... [meer...]