Underwater Volcanism

[Cedars]

This site might be helpful:

Global Volcanism Program | NW Rota-1 | Summary

[freeztar]

Originally Posted by Cedars

This site might be helpful:

Global Volcanism Program | NW Rota-1 | Summary

WOW!

You single-handedly brought all of Turtle and I's efforts into the ground and up into the sky. Thank you!

I found this excel spreadsheet from that link you offered, Cedars, and filtered it to only include sub-glacial and sub-marine volcanos. We've got a list of 143 with lat/long already listed!

Thanks again Cedars!

The excel file is provided courtesy of the Smithsonian Institution, Global Volcanism Program.

[Turtle]

Originally Posted by Cedars

This site might be helpful:

Global Volcanism Program | NW Rota-1 | Summary

Originally Posted by Freezy

WOW!

You single-handedly brought all of Turtle and I's efforts into the ground and up into the sky. Thank you!

I found this excel spreadsheet from that link you offered, Cedars, and filtered it to only include sub-glacial and sub-marine volcanos. We've got a list of 143 with lat/long already listed!

Thanks again Cedars!

Ditto on the thanks Cedars, and ditto ditto to you Freezter! I can open that file you made, by using the Quattro on this machine.

So we have 143, and I found some of those long-lost links. More-or-less, only 3 million or so more underwater volcanoes to list. The first link is also the item I mentioned on underwater volcanoes not at plate boundries or hotspots. Petit-spot volcanoes now need a looking up.

Thousand of new volcanoes revealed beneath the waves - earth - 09 July 2007 - New Scientist Environment

Originally Posted by Catherine Brahic

The true extent to which the ocean bed is dotted with volcanoes has been revealed by researchers who have counted 201,055 underwater cones. This is over 10 times more than have been found before.

The team estimates that in total there could be about 3 million submarine volcanoes, 39,000 of which rise more than 1000 metres over the sea bed.
...
In 2006, a team of researchers from Japan discovered a new type of volcano which also defied conventional theories of volcanism. The "petit-spot" volcanoes, aged between one to eight million years old, did not sit at tectonic plate boundaries or over volcanic hotspots.

New type of volcano:

New type of volcano fires imaginations - earth - 27 July 2006 - New Scientist Environment

Naoto Hirano at the Tokyo Institute of Technology, Japan, and colleagues have discovered miniature volcanoes – between 0.005 cubic kilometres and 1 km3 in size – near the underwater Japan Trench. These volcanoes, dubbed “petit spot” because of their size, cannot be accounted for by any of the conventional theories of volcanism. ...

Interesting bit here on how magma may dampen earthquakes:

Fragmented Structure Of Seafloor Faults May Dampen Effects Of Earthquakes

Originally Posted by science daily

...Examining data from 19 locations in the Atlantic, Pacific, and Indian oceans, researchers led by graduate student Patricia Gregg have found that “transform” faults are not developing or behaving as theories of plate tectonics say they should. Rather than stretching as long, continuous fault lines across the seafloor, the faults are often segmented and show signs of recent or ongoing volcanism. Both phenomena appear to prevent earthquakes from spreading across the seafloor, thus reducing their magnitude and impact.
...
The findings by Gregg, Lin, and colleagues may also have implications for understanding the theory of plate tectonics, which says that new crust is only formed at mid-ocean ridges. By traditional definitions, no crust can be created or destroyed at a transform fault. The new study raises the possibility that new crust may be forming along these faults and fractures at fast-spreading ridges such as the East Pacific Rise.

“Our understanding of how transform faults behave must be reevaluated,” said Gregg. “There is a discrepancy that needs to be addressed.”

[Cedars]

I am getting pretty good with google

[freeztar]

Originally Posted by Turtle

More-or-less, only 3 million or so more underwater volcanoes to list.

Now that's just silly...
Where's the spreadsheet for all those, cause I'm sure as heck not putting all that together!

New type of volcano:

Whoa!
I've got some (more) reading to do!

[Turtle]

Originally Posted by freeztar

Now that's just silly...
Where's the spreadsheet for all those, cause I'm sure as heck not putting all that together!

Whoa!
I've got some (more) reading to do!

No worries mate; we're just pushing this snowball to the edge of the hill.

I went Google Earth flying over the Pacific the other day, looking for underwater volcanoes listed and not, and I stumbled on a treasure to post in Racoon Sans 'Obscure Islands' thread.

Originally Posted by Turtle

Flying over the South Pacific on GoogleEarth Air and looking for underwater volcanoes, I zoomed in on a suspect obscure outcrop and found me a real turtle treasure island. ...............

Welcome to Suwarrow.

Suwarrow - Wikipedia, the free encyclopedia

So Suwarrow is a coral atoll, and I read up to refresh my memory on just what makes a coral atoll because coral doesn't grow in the deep. As I thought, Suwarrow is really an underwater volcano first, and a coral atoll second. Basically an underwater 'mountain' is a seamount if it doesn't break the surface, an island if it does, and a coral atoll if it has coral on top that surrounds a lagoon.

I love Serendipity...and she loves me.

[Cedars]

Originally Posted by freeztar

I found this excel spreadsheet from that link you offered, Cedars, and filtered it to only include sub-glacial and sub-marine volcanos. We've got a list of 143 with lat/long already listed!

I think the excel sheet needs column headers.

[freeztar]

Originally Posted by Cedars

I think the excel sheet needs column headers.

Done and done!

The original post has been updated with the new spreadsheet that has headers.

I wonder what the "status" header is referring to.
Some of the listings are "uranium-series", "magnetism", "historical", and "hydrophonic".

[freeztar]

Notice!

I didn't find this when I found the excel file, but I found it while digging around today. It seems we should notify them with any data we add to the list. I'm posting the usage guidelines below.

Using these Data

We have several requests for users of these data:

1) Please let us know of corrections or additions (with references or reprints if possible) that will help us improve the data file.

2) Please acknowledge "Smithsonian Institution, Global Volcanism Program" as the data source in any disseminated use of the data file.

3) We would appreciate a copy of whatever published work results from your use of the data.

This goes for both the excel summary list and the Google Earth placemarks.

[Turtle]

Originally Posted by freeztar

Notice!

I didn't find this when I found the excel file, but I found it while digging around today. It seems we should notify them with any data we add to the list. I'm posting the usage guidelines below.

This goes for both the excel summary list and the Google Earth placemarks.

Nothin' like profit to suck the fun right out of a well intended project. No good deed goes unpunished. I acknowledge deleting my copy of the Smithsonian Institution, Global Volcanism Program file. The buck stops here. ........................