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)

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Typical eruption style: unspecified
Don Joao de Castro Bank volcano eruptions: 1720 

Latest nearby earthquakes

TimeMag. / DepthDistance/Location
Sat, 19 Jun 2021 (GMT) (5 earthquakes)
19 Jun 2021 07:19:13 GMT
2.3
1.2 km (0.7 mi)
North Atlantic Ocean, 99 km northwest of Ponta Delgada, Azores, Portugal
19 Jun 2021 05:04:43 GMT
2.6
4.7 km (2.9 mi)
North Atlantic Ocean, 99 km northwest of Ponta Delgada, Azores, Portugal
19 Jun 2021 05:01:34 GMT
3.5

1 km
5.6 km (3.5 mi)
North Atlantic Ocean, 98 km northwest of Ponta Delgada, Azores, Portugal
19 Jun 2021 04:53:47 GMT
2.4
6.6 km (4.1 mi)
North Atlantic Ocean, 99 km northwest of Ponta Delgada, Azores, Portugal
19 Jun 2021 03:47:40 GMT
3.5
6.7 km (4.2 mi)
North Atlantic Ocean, 72 km southeast of Angra do Heroismo, Azores, Portugal

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


See also: Sentinel hub | Landsat 8
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