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Pumice Raft
On Aug. 9 , the HMNZS Canterbury , a Royal New Zealand Air Force ship , observed a stretch of float pumice stone , measuring a banging 300 miles ( 482 klick ) in length and more than 30 mile ( 48 km ) widely .
Off the Coast
The pumice " island " was floating in the South Pacific Ocean off the coast of New Zealand .
Porous Pumice
pumice stone , which forms when volcanic lava cools quick , is concentrate with pore due to gas trapped inside the lava as it harden and can therefore blow .
Veiled By Clouds
The submarine eruption responsible for the pumice raft is enshroud by cloud in this morning time image , which was contain byNASA ’s Moderate Resolution Imaging Spectroradiometer on July 19 , 2012 .
Spotting the Pumice
On the same day , though this time in the afternoon , NASA ’s MODIS snaps imagery clearly establish the Havre Seamount eruption , include the grayish pumice , ash - sully water and the volcanic plume .
Pumice in July
This NASA MODIS image , pick out on July 30 , 2012 , unveil the spreading pumice stone " lot " near Havre Seamount . ( pumice stone turn up by Erik Klemetti on Wired.com )
Havre Seamount
A multibeam echosounder image showing the submarine volcano call Havre Seamount , including a new cone that make during the July 2012 eruption .
