Underwater Volcanism

[Turtle]

Originally Posted by Turtle

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]

Originally Posted by REASON

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:

Originally Posted by WoodsHole

...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

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.

Originally Posted by Science Daily

'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. >>>>>>>>>

Originally Posted by Live Science

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.

Originally Posted by Alaska.edu

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]

Originally Posted by 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

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?