Katla

South Coast

Katla sits beneath the Mýrdalsjökull ice cap on Iceland's South Coast, its caldera roughly 10 kilometres across. Historically it has erupted every 40 to 80 years, yet the last major eruption was in 1918 — making the current dormancy one of the longest on record. A minor subglacial event occurred in 1999, and the Icelandic Met Office monitors the system continuously. When Katla does erupt, rapid ice melt produces enormous glacial floods capable of briefly exceeding the discharge of the Amazon, as happened in 1918. Visitors experience Katla through guided glacier walks and ice cave tours on Mýrdalsjökull. Ice caves are accessible roughly October through March when the ice is stable; glacier walks run year-round. Always check current volcanic status before going out and use only licensed guides — conditions on the glacier change quickly. The volcano's summit reaches about 1,512 metres, though the caldera is entirely buried under ice. The surrounding outwash plains bear the scars of past floods, and the black sand coast nearby gives some sense of the scale of what Katla can produce.

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