Katla is an important caldera and central volcano situated under the Mýrdalsjökull glacier cap in the southern part of Iceland's East Volcanic Zone. 150-200 eruptions during Holocene have been attributed to her, and 17 of these happened since Settlement of Iceland in the 8th century. Most of the eruptions had their origin in the ice covered caldera. The last contested big eruption took place in 1918 and initiated a jökulhlaup with an estimated peak discharge of 300.000 m3/sec.