Rabaul Caldera

Rabaul Caldera has been the site of a number of historic volcanic eruptions, most notably the 1937-1943 eruptions and the most recent eruptive phase, commencing 19 September. In 1986 the University of Hawaii research vessel Moana Wave visited the Rabaul Caldera and collected sidescan and bathymetry using the SeaMARC II swath mapping system. The sidescan data is reproduced here, including aerial photography from the Australian Air Force.