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Random pictures

Don Joao de Castro Bank volcano

Submarine volcano -13 m / - 43 ft
Azores, Portugal, 38.23°N / -26.63°W
Current status: normal or dormant (1 out of 5) | Reports
Don Joao de Castro Bank volcano books
Typical eruption style: unspecified
Don Joao de Castro Bank volcano eruptions: 1720 
TimeMag. / DepthDistanceLocation
Sat, 17 Nov
Sat, 17 Nov 10:43 UTCM 2.4 / 5.2 km32 kmSE Terceira
Sat, 17 Nov 08:10 UTCM 3.1 / 5 km28 kmAZORES ISLANDS, PORTUGAL
Mon, 12 Nov
Mon, 12 Nov 00:44 UTCM 2.7 / 4.1 km43 kmFossa Hirondelle
Sat, 10 Nov
Sat, 10 Nov 12:24 UTCM 2.1 / 5 km19 kmSE Terceira
Wed, 7 Nov
Wed, 7 Nov 02:16 UTCM 2.720 kmSE Terceira
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Background:

Don Joao de Castro Bank is a large submarine volcano that rises to within 13 m of the sea surface roughly halfway between Terceira and San Miguel Islands. Pillow lavas form the base of the volcano, which is capped by basaltic hyaloclastites. A submarine eruption during December 1720 produced an ephemeral island that attained a length of 1.5 km and an altitude of about 250 m before it was eroded beneath the sea surface two years later. The volcano (also spelled Dom Joao de Castro) was named after the Portuguese hydrographic survey vessel that surveyed the bank in 1941. Two youthful parasitic craters, one tephra covered and the other sediment free, are located on the NW flank. The submarine volcano has an impressive shallow fumarole field and remains seismically active.
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Smithsonian / GVP volcano information


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