Submarine Volcanoes
About 10 kilometres off the main island of Tongatapu there is an area where up to 36 undersea volcanoes are clustered.
On March 18th 2009 an undersea eruption was taking place near the low-lying twin volcanic islands of Hunga Tonga and Hunga Ha'apai, and within sight of the capital, Nuku'alofa.



mountainstamp.com Submarine volcano eruption of 2009 issued by Guinea Bissau 2012
Guinea Bissau 2012, Submarine volcanic eruption 2009.
The stamp was issued in the series "Minerals and Volcanoes".