Þórðarhyrna (Thordarhyrna) is below the Vatnajökull glacier with the ice between 100-600 m thick, shown in this 29 October 2019 Sentinel-2 satellite image (N is at the top; this image is approximately 52 km across). The edifice is 15 km in diameter and is part of the Grímsvötn volcanic system. Cauldrons that have formed within the ice above indicate geothermal activity.

Satellite image courtesy of Copernicus Sentinel Data, 2019.

This image is made available under the Creative Commons BY-SA 4.0 license terms.

Þórðarhyrna