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Portugal · Shield volcano

Dom João de Castro Bank

Don Joao de Castro Bank

Type
Shield volcano
Elevation
13m (submarine)
Last eruption
1720
This side-viewing sonar image shows two 45 x 90 m craters on the NW flank of Don Joao de Castro Bank in the Azores taken by U.S. Navy submarine NR-1. The younger left crater displays a floor consisting of a chilled lava lake with polygonal surface fractures. The right crater is much less distinct because its surface is obscured by tephra deposits. The line at the right is the center track line of the sonar image.
This side-viewing sonar image shows two 45 x 90 m craters on the NW flank of Don Joao de Castro Bank in the Azores taken by U.S. Navy submarine NR-1. The younger left crater displays a floor consisting of a chilled lava lake with polygonal surface fractures. The right crater is much less distinct because its surface is obscured by tephra deposits. The line at the right is the center track line of the sonar image. · Photo: U. S. Navy image courtesy of Rick Wunderman, 2003 (Smithsonian Institution).
Type
Shield volcano
Country
Portugal
Region
Atlantic Ocean / Azores-Terceira Rift Volcanic Province
Elevation
13m (submarine)
Coordinates
38.230, -26.630
Last eruption
1720
Tectonic setting
Rift zone / Oceanic crust (< 15 km)
Landform
Shield
Major rock type
Basalt / Picro-basalt

Geological summary

Don Joao de Castro Bank is a large submarine volcano that rises to within 13 m of the ocean surface roughly halfway between Terceira and San Miguel Islands.

Excerpt from the Global Volcanism Program, Smithsonian Institution · Read the full summary on GVP →

From Wikipedia

Dom João de Castro Bank is a large submarine volcano located in the central north Atlantic Ocean, between the islands of São Miguel and Terceira in the archipelago of the Azores.

Wikipedia · CC BY-SA · Read full article →

Eruption history

2 recordedGlossary

Record summary

Confirmed eruptions
1
Uncertain eruptions
1
Span of confirmed record
1720 – 1720
Largest confirmed eruption
VEI 3 (1720)
Confirmed eruptions since 1900
0
Summary (VEI over time)
Click a bar to see individual eruptions · Use arrow keys to move between bars, Enter to open
1720~1748 · 1 eruptions · max VEI 31969~1997 · 1 eruptions · max VEI 017201775185919141969

Detailed timeline

  1. 1997VEI 0Method not stated
    1997-06-27 – 1997-07-16
    NW of Don Joao de Castro Bank
  2. 1720VEI 3Observed
    1720-12-08 – 1720-12-26

Nearby volcanoes

External links

⚠ For reference only. Not for emergency response.