Uncertainly level declared for Öræfajökull volcano, aviation code moved to yellow alert

Yesterday the Department of Civil Protection and Emergency Management declared uncertainty level for Öræfajökull volcano. Aviation colour code was also moved up to yellow alert level (can be viewed here).

Current status is that a ice cauldron has formed in the centre of the Öræfajökull volcano caldera. It is about 1 km wide and around 21 to 25 meters deep according to early measurements. This is the first time in documented history that such ice cauldrons has formed in Öræfajökull volcano. It is now believed that the ice cauldron has been emptying it self all week resulting in smell of sulphur in Kvíá glacier river. The glacier river can be viewed here on Google Maps Street View. Currently there is not a lot of earthquake activity happening in Öræfajökull volcano. This is to be expected (I guess). It is also worth noting that Öræfajökull volcano did do in few months what took Eyjafjallajökull volcano 16 years to do until an eruption happened.

There is not a lot of details on earlier eruptions from Öræfajökull volcano. Earliest eruption to our in time took place between 1727 and until 1728 (289 years). Before that an eruption took place in 1362 (655 years) and lasted for five months. Currently I don’t have a lot of information about the current status. This is due to lack of measurements as it was not expected that Öræfajökull volcano would do this even if earthquake activity was happening in the volcano. It was only from October (it seems) that it was figured out that something was going on in Öræfajökull volcano.


No earthquake activity in Öræfajökull volcano during the past 48 hours (blue dot in the south part of the image). Copyright of this image belongs to Icelandic Met Office.

Images of the new ice cauldron can be found here on Icelandic Met Office website.

I’ll post new information in this article as needed. If anything major happens I’ll write a new article.

Article updated at 16:26 UTC. Added information that I forgot.

High conductivity in glacier rivers coming form Mýrdalsjökull glacier (Katla volcano)

During the last few days there has been high conductivity in glacier rivers coming from Mýrdalsjökull glacier (Katla volcano). Due to how cold it is the glacier rivers are not getting any melt water or water from clear streams and that is making the hydrothermal water stronger than normal. Current conductivity is 567µS/cm in Múlakvísl in Mýrdalssandur sand area (not sure where the sensor is located). Some gas has also been detected and that gas is toxic and enough amount to result in breathing problems. Measured amount of H2S was 1ppm and this gas is toxic.

Some minor earthquake activity has been in Katla volcano during the last two days. That earthquake activity might be due to the emptying of the cauldrons in Mýrdalsjökull glacier. The magnitudes in this earthquake activity is minor and all below 2,0 at the moment.


Earthquake activity in Katla volcano. Copyright of this image belongs to Icelandic Met Office.

It is difficult to know if this means anything other than cauldrons in the glacier emptying them self in nearby glacier rivers.

Magnitude 3,4 earthquake in Tjörnes Fracture Zone during the night

At 01:01 UTC on 18-November-2017 there was a magnitude 3,4 earthquake in western part of the Tjörnes Fracture Zone. A foreshock of magnitude 2,2 occurred at 00:30 UTC. Only this two earthquakes happened at this location north of Siglufjörður village.


The earthquake activity in TFZ during the night. Copyright of this image belongs to Icelandic Met Office.

The larger earthquake was felt in Siglufjörður village.