November 30, 2022

Seamounts and Submarine Volcanoes

Here is an excerpt from a paper currently being written by Richard Cronin. It's still in rough draft form, but I think everyone may find it interesting (I certainly did):

Seamounts and Submarine Volcanoes

Via bathyscaphic ocean floor mapping, Hillier and Watt (2007) provided an estimate of 3.0 to 3.5 million oceanic seamounts which by definition are formed by submarine volcanoes. This estimate excludes estimates above latitudes 60 degrees North and South. Reference: "Global distribution of seamounts from ship-track bathymetry data”. Oregon State University

Per the Smithsonian’s ‘Volcanoes of the World’ database, there have been 1350 volcanoes identified since the beginning of the Holocene. This resource also describes 56 - 88 active eruptions per year. Therefore, the percent of actively erupting subaerial volcanoes ranges from 4 to 5 %.

Applying these percentages to 3 million seamounts indicates that actively erupting submarine volcanoes at the low end ranges from 120,000 to 150,000 in any given year and this excludes estimates for latitudes above 60 degrees even though the polar regions are very seismically active. The height of these submarine volcanoes range down to h > 0.1 km, as magma is quenched immediately upon contact with ocean waters, forming pillow lava, rather than building into a higher peak.

"Global distribution of seamounts from ship-track bathymetry data”
J.K. Hillier, A.B. Watts, Geophysical Research Letters, July, 2007. See Table 1.


Oregon State’s Volcano World website estimates that 75% of Earth’s magma flow comes from submarine volcanoes, but their data is just from 1997 and earlier.

Moreover, SO2 and other sulfur-bearing acids discharging into alkaline ocean waters yield the Heat of Neutralization and Heat of Dilution.

Posted by: Timothy Birdnow at 09:24 AM | Comments (3) | Add Comment
Post contains 276 words, total size 2 kb.

1 Seamounts and submarine volcanoes are two different things. Seamounts are underwater mountains that rise above the ocean surface. They're formed by plate tectonics, when segments of the Earth's crust slide past each other. Explore this Cybersecurity Cape Girardeau for more ideas. Submarine volcanoes are underwater volcanoes that erupt through the sea floor. The eruption occurs through a vent, or hole in the seafloor, and lava that erupts from a volcano is called hot lava.

Posted by: jasmin at December 21, 2022 02:03 AM (f7R4h)

2 Fair enough description Jasmin. Thanks.

Posted by: Timothy Birdnow at December 21, 2022 05:22 AM (reE4p)

3 but I think everyone may find it interesting (I certainly did):

Posted by: Fake Tag Heuer at May 23, 2023 06:38 AM (SUYyh)

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