This pumice block, with a one-pound coin for scale (diameter ~24 mm), was collected from the ocean surface near Tristan da Cunha on 3 August 2004. An earthquake swarm lasting 6 hours beginning on 29 July was felt on the island and followed by observations of large blocks of floating pumice.

Photo by Vicky Hards, 2004 (British Geological Survey, copyrighted NERC).

Copyrighted image used with permission. All Rights Reserved. Contact photographer for any usage requests.

Keywords: pumice

Tristan da Cunha