The earthquake swarm which began in the Katla caldera under Mýrdalsjökull glacier in South Iceland the night before yesterday has died down for now, according to seismologist Martin Hensch at the Icelandic Met Office.
The last tremor of the earthquake swarm was recorded in Katla at 5:45 am this morning. It was the last in a series of six minor quakes which occurred last night, ruv.is reports.
However, increased conductivity has been measured in Múlakvísl river, which originates in Mýrdalsjökull, as well as a high concentration of sulfuric dioxide and hydrogen sulphide.
Specialists from the Icelandic Met Office are putting up pollution detectors and people are warned against being in the vicinity of the river. The gases are likely related to the activity in Katla.