Strong earthquake swarm shakes Katla volcanic system beneath Mýrdalsjökull, Iceland

"A strong seismic swarm began beneath Iceland’s Mýrdalsjökull glacier around 10:30 UTC on October 20, producing several earthquakes above M3.0 and the largest event of M4.5 at 10:51.
The swarm occurred within the Katla volcanic system, beneath the western part of the ice cap." W