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Baclava

(12,047 posts)
Fri Dec 18, 2020, 01:46 PM Dec 2020

2020 not over yet...Antarctica rocked by 30,000 tremors in 3 months

Scientists with the university's National Seismological Center said the small quakes - including one stronger shake of magnitude 6 - were detected in the Bransfield Strait, a 60-mile wide (96-km) ocean channel between the South Shetland Islands and the Antarctic Peninsula.

Several tectonic plates and microplates meet near the strait, leading to frequent rumbling, but the past three months have been unusual, according to the center.

"Most of the seismicity is concentrated at the beginning of the sequence, mainly during the month of September, with more than a thousand earthquakes a day," the center said.

https://news.trust.org/item/20201216194409-mv2cy

-------------------------

Scientists located 70 + new volcanoes under the ice in 2017

It's all cracking open?



The Kraken being released?


Alien bases under the ice are up to something big?


Cthulhu Rising?




I need to do more research...stand by

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FirstLight

(15,771 posts)
1. welp, that does it...
Fri Dec 18, 2020, 01:54 PM
Dec 2020

looks like we might carry over the 2020 insanity into 2021?


...I welcome our alien overlords....

Mendocino

(8,492 posts)
2. There are many plates
Fri Dec 18, 2020, 02:17 PM
Dec 2020

in that area and adjacent to:

Antarctic
South American
Scotia
Shetland
Sandwich

The Mendocino Triple Junction (MTJ) in Northern California is another active zone. That includes the Juan De Fuca, Pacific and the North American plates. That will be the "big one", when the Cascade region shifts.

roamer65

(37,953 posts)
4. The subduction zone off the coast of Oregon and Washington is overdue for a massive quake.
Fri Dec 18, 2020, 02:38 PM
Dec 2020

If it ruptures like the Andaman quake of 2004, it will at least be a 9.0 on the Richter scale.

Mendocino

(8,492 posts)
11. The last one
Fri Dec 18, 2020, 03:37 PM
Dec 2020

Cascadian Subduction was about 1700. This coming event will stretch from California, Oregon, Washington and British Columbia. This will be a full-margin rupture, between 8.7 to 9.2 .

csziggy

(34,189 posts)
9. Yeah, and as the ice and glaciers melt, the pressure on those plates is reduced
Fri Dec 18, 2020, 03:18 PM
Dec 2020

And that release of weight can cause earthquakes even in the middle of plates without faults.

roamer65

(37,953 posts)
3. It's due to the lightening ice load.
Fri Dec 18, 2020, 02:33 PM
Dec 2020

Not as much downward pressure on the Antarctic plate.

You will see more of this down under.

 

Baclava

(12,047 posts)
5. That's where I remember the volcano thing from!
Fri Dec 18, 2020, 02:42 PM
Dec 2020


Scientists discover 91 volcanoes below Antarctic ice sheet


Scientists have uncovered the largest volcanic region on Earth – two kilometres below the surface of the vast ice sheet that covers west Antarctica.

The project, by Edinburgh University researchers, has revealed almost 100 volcanoes – with the highest as tall as the Eiger, which stands at almost 4,000 metres in Switzerland.

Geologists say this huge region is likely to dwarf that of east Africa’s volcanic ridge, currently rated the densest concentration of volcanoes in the world.

And the activity of this range could have worrying consequences, they have warned. “If one of these volcanoes were to erupt it could further destabilise west Antarctica’s ice sheets,” said glacier expert Robert Bingham, one of the paper’s authors. “Anything that causes the melting of ice – which an eruption certainly would – is likely to speed up the flow of ice into the sea.

“The most volcanism that is going in the world at present is in regions that have only recently lost their glacier covering – after the end of the last ice age. These places include Iceland and Alaska.

“Theory suggests that this is occurring because, without ice sheets on top of them, there is a release of pressure on the regions’ volcanoes and they become more active.”


https://www.theguardian.com/world/2017/aug/12/scientists-discover-91-volcanos-antarctica

roamer65

(37,953 posts)
7. Gonna be a very interesting next 100 years.
Fri Dec 18, 2020, 02:44 PM
Dec 2020


Thank the cloud beings I’m not gonna be around for the nastier part of it.

RussBLib

(10,635 posts)
6. That's about the only natural disaster left on the 2020 bingo card
Fri Dec 18, 2020, 02:44 PM
Dec 2020

That and a massive asteroid.

I'm not knocking on wood.

roamer65

(37,953 posts)
8. I'm surprised we haven't had a Mount Tambora style eruption like in 1815.
Fri Dec 18, 2020, 02:47 PM
Dec 2020

That eruption resulted in 1816 being called “the year without a summer”.

In 1815, the explosion was heard clearly from 1200 miles away.

https://en.wikipedia.org/wiki/Mount_Tambora

 

aidbo

(2,328 posts)
13. I think I read somewhere...
Fri Dec 18, 2020, 03:49 PM
Dec 2020

(I know that doesn’t mean much in the reliability scale)

I think I read somewhere that the huge amount of ice on Antarctica actually causes the crust of the earth to depress under the weight of the ice. If that ice is melting and diminishing as the seas rise, could it also mean that the crust could be shifting as well? Basically rebounding up as the weight on top decreases. This is Utter speculation with zero research, just an interesting idea I thought.

Fullduplexxx

(8,626 posts)
15. The ice was holding it.once enough of it is gone the volcanoes
Fri Dec 18, 2020, 04:18 PM
Dec 2020

Unddr the ice are gonna blow big and start the next ice age ...... or not

jeffreyi

(2,571 posts)
16. Just Mother Earth having a little stretch.
Fri Dec 18, 2020, 04:47 PM
Dec 2020

Everything going on is not all about us? Who woulda thunk.

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