Katla is coming / In production
Katla is among the most frequently erupting volcanoes in Iceland, averaging to about two eruptions each century. The last eurption in Katla occured in 1918. The Southern coast was extended by 5 km by the laharic flood deposits. The present volcanic response is among the longest known in historic times, but monitoring of ground deformation and seismicity does not reveal any signs of reawakening. Seismic unrest does occur from time to time and as a precautionary measure, the traffic across the sandur plain is then halted on both sides of the plain.
But alarmingly, there are signs of high activity beneath Katla caldera – a possible sign of an impending eruption. This should prompt extensive high-level contingency planning across Europe, as Katla has the potential to be much more damaging than Eyjafjallajökull. If enough material is ejected, it could even have cooling effect on the global climate for a few years.