Mount Sinabung spews pyroclastic smoke as seen from Tigapancur village in Karo district on November 2013 in Medan, Sumatra, Indonesia. Up to residents have been evacuated from five villages in North Sumatra due to the volcanic eruptions of Mount Sinabung.
Eyjafjallajökull is one of the smaller ice caps of Iceland, situated to the north of Skógar and to the west of Mýrdalsjökull. The ice cap covers the caldera of a volcano with a summit elevation of metres.
Phreatic eruptions - Credit: Photograph by D.A. Swanson on 4 April 1980. Phreatic eruptions Phreatic eruptions are stream-driven eruptions that happen when water beneath or above the ground is heated up, potentially causing it to boil and "flash to steam," creating an explosion, according to the U.S. Geological Survey.