Mýrdalsjökull is a glacier in the south of Iceland. It is to the north of Vík í Mýrdal and to the east of the smaller glacier Eyjafjallajökull. Between these two glaciers is Fimmvörðuháls pass. Its peak reaches 1,493 m in height and in 1980 it covered an area of 595 km . The icecap of the glacier covers an active volcano called Katla. The caldera of the volcano has a diameter of 10 km and the volcano erupts usually every 40–80 years. The last eruption took place in 1918.