Iceland’s Askja volcano is the massive lake in the background. The large crater of turquoise water is merely the Víti geothermal lake vent blown from the crater in the dreaded 1875 eruption. Víti is so large, people standing on the crater’s rim look like ants.
August 10, 2012 – ICELAND – In Iceland, Askja volcano has been showing increased signs of unrest including higher than background levels of tremor, as Diana Barnes remarked on VolcanoCafe. –Volcano Discovery