[Turtle]

Turtle said:

I never found the specific location mentioned in that latest article. >> Fire Under Arctic Ice: Volcanoes Have Been Blowing Their Tops In The Deep Ocean Anyway, we just had a 5.6 quake up on Gakkel Ridge. Eeeeeruption!!!?

Magnitude 5.6 - NORTH OF SEVERNAYA ZEMLYA

This has developed into a shock/aftershock series, with the 5.6 upgraded to a 5.7. No 'official' mention of submarine volcanism associated, just my little bug in your ears.

map: 10-degree Map Centered at 85°N,100°E

Magnitude 5.7 - NORTH OF SEVERNAYA ZEMLYA
Magnitude 5.4 - NORTH OF SEVERNAYA ZEMLYA
Magnitude 4.4 - NORTH OF SEVERNAYA ZEMLYA
Magnitude 4.5 - NORTH OF SEVERNAYA ZEMLYA
Magnitude 4.9 - NORTH OF SEVERNAYA ZEMLYA

[REASON]

Are you experiencing these quakes, Turtle, or are they too far away?

Edit: This belongs in the Stupid Questions thread. It would help if I read the links before I asked my ignorant question. I imagine Russia is to far for you to feel these quakes.

[Turtle]

REASON said:

Are you experiencing these quakes, Turtle, or are they too far away?

I want to say, too far away. At least, too far to feel the shaking like I do from St. Helens.

I can tell you though, that no one over a wide region here would miss a 5.7 at St. Helens, and I can't get the bit out of my head from that article that says:

WoodsHole said:

...One reason is the tremendous pressure exerted by the weight of seawater, known as hydrostatic pressure. More importantly, it is very difficult to build up the amount of steam and carbon dioxide gas in the magma that would be required to explode a mass of rock up into the water column. (Far less energy is needed to do so in air.) In fact, the buildup of CO2 in magma in the sea crust would have to be ten times higher than anyone has ever observed in seafloor samples. ...

Fire Under Arctic Ice: Volcanoes Have Been Blowing Their Tops In The Deep Ocean

Now from St. Helens we got

Quote

24 megatons thermal energy (7 by blast, rest through release of heat)

Mount St. Helens -- From the 1980 Eruption to 2000, Fact Sheet 036-00

Now multiply by 10 (yes/no?) and put underwater, under ice. I think we need some computer modeling here to get more specific, but that's a lot of jewels unaccounted for in the Arctic. Avast ye! There be treasure thar on Gakkel Ridge!!

[Turtle]

If what we know about submarine volcanism was your eduacation, you wouldn't even know the alphabet yet.

Science Daily said:

'Lost World' Beneath Caribbean To Be Explored
...
The team of researchers led by Dr Jon Copley has been awarded £462,000 by the Natural Environment Research Council to explore the Cayman Trough, which lies between Jamaica and the Cayman Islands. This rift in the Caribbean seafloor plunges to a depth of more than 5000 metres below sea level. It contains the world's deepest chain of undersea volcanoes, which have yet to be explored. ...

'Lost World' Beneath Caribbean To Be Explored

[Turtle]

Question: When is a submarine volcano not a submarine volcano?
Answer: When it rises above sea level?

Real Answer: Never. >>>>>>>>>

Live Science said:

Reports of unusually fiery orange sunsets on Earth and ruby red rings around the planet Venus have popped up on the Internet in the last week.

Some skywatchers suspect that these views are being colored by the dust and gases injected into the atmosphere by the Aug. 7 eruption of Alaska's Kasatochi volcano. The skywatchers are probably right.

Kasatochi, part of the Aleutian Island chain, sent an ash plume more than 35,000 feet (10,600 meters) into the atmosphere when it erupted last month. ...

Volcano's Eruption Colors World's Sunsets | LiveScience

Whatever your view, and whatever is going on up around Alaska that we can't see under the sea, this past week has demonstrated the wide effects of submarine volcanoes with their heads out.

Alaska.edu said:

Description
From Miller and others (1998): "Kasatochi Island, like Gareloi, Bogoslof, and several other volcanoes in the western Aleutian arc, represents the emergent summit of a predominantly submarine volcano. The island consists of a single, undissected cone with a central lake-filled crater about 0.75 km in diameter. A maximum height of 314 m is on the southern crater rim; elevation of the lake is less than about 60 m. Kay (1990) reports a lava dome on the northwest side of the cone at an elevation of ~150 m. ...

Kasatochi - Introduction

[REASON]

Here's an new article about an underwater volcano that's been erupting over the last several days near Tonga, an island in the South Pacific near Fiji.

Undersea volcano erupts near Tonga - Science- msnbc.com

[Turtle]

REASON said:

Here's an new article about an underwater volcano that's been erupting over the last several days near Tonga, an island in the South Pacific near Fiji.

Undersea volcano erupts near Tonga - Science- msnbc.com

Way to stay on top of things Reasonator!!!

Breaking news now from that region with a preliminary 7.9 great quake: >> Magnitude 7.9 - TONGA REGION

Redoubt perked up 2 days ago with a steam/ash burst, then quieted down to let Tonga talk. More to come ...

[REASON]

Thanks, Turtle.

I hope you checked out the video footage of the eruption at that link I provided. Pretty awesome stuff. I became fairly concerned at the end of the clip because it looked like a good little pyroclastic flow was headed toward the boat with the photographers.

Obviously they got out of there or we wouldn't be watching their footage, huh?

[Turtle]

fascinating!

NOAA - National Oceanic and Atmospheric Administration - Scientists Discover and Image Explosive Deep-Ocean Volcano

NOAA said:

December 17, 2009

Scientists funded by NOAA and the National Science Foundation recorded the deepest erupting volcano yet discovered, describing high-definition video of the undersea eruption as “spectacular.” Eruption of the West Mata volcano, discovered in May, occurred nearly 4,000 feet below the surface of the Pacific Ocean, in an area bounded by Fiji, Tonga and Samoa.
...
For the first time we have been able to examine, up close, the way ocean islands and submarine volcanoes are born,” says Barbara Ransom, program director in NSF’s Division of Ocean Sciences. “The unusual primitive compositions of the West Mata eruption lavas have much to tell us.”

The West Mata volcano is producing Boninite lavas, believed to be among the hottest erupting on Earth in modern times, and a type only seen before on extinct volcanoes older than a million years.
...
Mission scientists believe 80 percent of eruptive activity on Earth takes place in the ocean, and most volcanoes are in the deep ocean. Until this discovery, NOAA and NSF had sponsored research on submarine volcanoes for 25 years without observing a deep-ocean eruption. Scientists believe further study of active deep-ocean eruptions will provide a better understanding of oceanic cycles of carbon dioxide and sulfur gases, how heat and matter are transferred from the interior of the Earth to its surface, and how life adapts to some of the harshest conditions on Earth.
...

[Turtle]

an underwater volcano near japan is erupting anew today.

Yomiuri Shimbun said:

... According to an announcement by the 3rd Regional Coast Guard Headquarters of the Japan Coast Guard, based in Yokohama, the volcano spewed ash and smoke about 100 meters into the air, and the surrounding sea area changed to a yellowish-green color while other parts became a cloudy gray.

According to the Meteorological Agency, the volcano, known as Fukutokuokanoba, has erupted seven times since 1904, when its activities were first recorded. On three occasions, land masses were formed, but all later sank below the waterline. ...

Underwater volcano could create Pacific island

video: >> Caught on Tape: Underwater Volcano May Form New Island | WNCT

aerial still image: >> http://mdn.mainichi....0na017000c.html

i don't see anything unuusal on the seismogram stations, but i don't usually visit them & so have little to compare them to. presented for your approval...
seismogram stations for japan: http://www.fnet.bosa...eesia/waveform/

[Turtle]

no photos that i can find yet of this new underwater volcanic eruption, but that's par for such a remote course. we'll take what we can get.

Saipan Tribune

Ferdie de la Torre said:

...The U.S. Geological Survey's report yesterday stated that an eruption cloud up to 40,000 feet appeared to be over or near Anatahan volcano in the satellite image.

USGS said current evidence points to the source being the submarine seamount south of Sarigan.

USGS said the cloud may contain ash but could be made up largely of water vapor and appears to be shrinking as northerly winds carry it toward the CNMI and Guam.

“No additional volcanic clouds have been detected and it is unknown if submarine activity is continuing. Observers on Sarigan reported hearing a loud explosion from the south, and shortly thereafter receiving ash fall. They also reported the sound of a wave passing by,” USGS said. ...

[Turtle]

news from home...stop we have an unprecedented new view of some undersea volcanoes...stop. see full article & video @ link...go (there is nothing like deep water for a disaster. )

Undersea mountains march into the abyss @ bbc

David Shukman said:

Sonar images of the Tonga Trench. Video courtesy of the Universities of Oxford and Durham and NERC

Startling new images from the depths of the Pacific Ocean reveal one of Earth's most violent processes: the destruction of massive underwater mountains. The pictures were created by sonar in waters up to 6km (4mi) deep. They expose how tectonic action is dragging giant volcanoes into a chasm in the seabed.
The volcanoes are strung across several thousand kilometres of ocean floor and are moving westward on the Pacific tectonic plate at up to 6cm per year.The extraordinary scene was captured along the Tonga Trench during a research expedition last summer.The trench is a highly active fault line running north from New Zealand towards Tonga and Samoa.

The first images have been released to BBC News as the findings are presented to the annual conference of the American Geophysical Union. They are the result of a joint project by the universities of Oxford and Durham, funded by the Natural Environment Research Council.
...

[7DSUSYstrings]

Turtle, on 15 January 2008 - 12:21 PM, said:

We start with one eruption, and then build from there. What do we know about underwater volcanoes, and what do we not? ........

Underwater - Submarine Volcanoes

We are learning more all the time. The question I would have involve the water and steam that finds its way to the lava tubes and magma chambers causing the steam in the first place, regarding how much.

[Turtle]

7DSUSYstrings, on 22 March 2012 - 06:00 PM, said:

We are learning more all the time. The question I would have involve the water and steam that finds its way to the lava tubes and magma chambers causing the steam in the first place, regarding how much.

thanks for posting. after some searching i could not find any estimates of output rate/volume for even a single "black smoker" as many hydrothermal vents are termed. keep in mind that at the pressures involved there is no steam, rather the water superheats. here's a page you may find of general interest & a few quotes. i'll keep an eye out for some reference to an "amount".

Black Smokers

american museum of natural history said:

You've probably seen or heard of natural hot springs on land, like Old Faithful at Yellowstone National Park. Similar phenomena occur under the oceans within midocean ridge volcanoes and are called deep-sea hydrothermal (hot water) vents. They are known as black smokers, like the ones seen above. These black smokers are chimneylike structures made up of sulfur-bearing minerals or sulfides that come from beneath Earth's crust. They form when hot (roughly 350¡C)[662 degrees Fahrenheit] , mineral-rich water flows out onto the ocean floor through the volcanic lava on a mid-ocean ridge volcano.
...
Large amounts of heat and chemical mass are transferred from deep within Earth to Earth's surface through deep-sea hydrothermal vents. The chemistry of ocean water is controlled in part by this process. Thus, understanding how deep-sea hydrothermal vents work is critical to understanding the dynamic nature of our planet.
...

[7DSUSYstrings]

Turtle, on 22 March 2012 - 06:47 PM, said:

thanks for posting. after some searching i could not find any estimates of output rate/volume for even a single "black smoker" as many hydrothermal vents are termed. keep in mind that at the pressures involved there is no steam, rather the water superheats. here's a page you may find of general interest & a few quotes. i'll keep an eye out for some reference to an "amount".

Black Smokers

True at increased pressures boiling temperatures change, thus superheaqting, still, as soon as something disrupts that confined volume, boiling occurs very rapidly and steam does develop, running away with the expansion.