Four of Iceland's main volcanoes all preparing for eruption
Hekla, Grímsvötn, Bárðarbunga and Katla are all preparing for eruption. mbl.is/Ómar Óskarsson
According to geophysicist Páll Einarsson, four of Iceland's volcanoes are showing increased amounts of activity in preparation for another eruption.
Katla is the most active that it's ever been in four decades. "Katla has been unrestful since this autumn."
The other volcanoes showing increased activity are Hekla, Grímsvötn and Bárðarbunga.
Hekla is located in South Iceland and erupts every ten years or so. Golli / Kjartan Þorbjörnsson
Bárðarbunga - the last eruption in Holuhraun lasted for a whole year. Rax / Ragnar Axelsson
The Grímsvötn volcano is located underneath the Vatnajökull glacier. Here farmers are shown trying to save sheep from poisonous volcanic ash. Mbl.is/ Eggert Jóhannesson
Katla is Iceland's most dangerous volcano and is located underneath the Mýrdalsjökull ice cap. Rax / Ragnar Axelsson
