Tungnafellsjökull central volcano has not have recorded historical activity, but is considered an active volcano that has erupted during the past 10,000 year, mainly from flank fissures on the NE side where young basaltic lava flows occur.
It is located to the NW of the Vatnajökull glacier and contains two calderas. One is largely filled by the Tungnafellsjökull glacier, while the other one to the SE is free of ice and has old rhyolitic lava flows.
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