• About Us
  • Contact Us
  • Cookie policy (EU)
  • Home
  • Privacy Policy
  • Video
  • Write for us
Today Headline
  • HOME
  • NEWS
    • POLITICS
    • News for today
    • Borisov news
  • FINANCE
    • Business
    • Insurance
  • Video
  • TECHNOLOGY
  • ENTERPRISE
  • LIFESTYLE
    • TRAVEL
    • HEALTH
    • ENTERTAINMENT
  • AUTOMOTIVE
  • SPORTS
  • Travel and Tourism
  • HOME
  • NEWS
    • POLITICS
    • News for today
    • Borisov news
  • FINANCE
    • Business
    • Insurance
  • Video
  • TECHNOLOGY
  • ENTERPRISE
  • LIFESTYLE
    • TRAVEL
    • HEALTH
    • ENTERTAINMENT
  • AUTOMOTIVE
  • SPORTS
  • Travel and Tourism
No Result
View All Result
TodayHeadline
No Result
View All Result

Record-Breaking Earthquake Swarm Hits Antarctica as Sleeping Volcano Awakens – ScienceAlert

April 29, 2022
in Tech
0
Record-Breaking Earthquake Swarm Hits Antarctica as Sleeping Volcano Awakens – ScienceAlert
0
SHARES
0
VIEWS
Share on FacebookShare on Twitter

A long-dormant underwater volcano near Antarctica has woken up, triggering a swarm of 85,000 earthquakes.

The swarm, which began in August 2020 and subsided by November of that year, is the strongest earthquake activity ever recorded in the region. And the quakes were likely caused by a “finger” of hot magma poking into the crust, new research finds. 

“There have been similar intrusions in other places on Earth, but this is the first time we have observed it there,” study co-author Simone Cesca, a seismologist at the GFZ German Research Centre for Geosciences in Potsdam, told Live Science. “Normally, these processes occur over geologic time scales,” as opposed to over the course of a human life span, Cesca said. “So in a way, we are lucky to see this.”

The swarm occurred around the Orca Seamount, an inactive volcano that rises 2,950 feet (900 meters) from the seafloor in the Bransfield Strait, a narrow passage between the South Shetland Islands and the northwestern tip of Antarctica. In this region, the Phoenix tectonic plate is diving beneath the continental Antarctic plate, creating a network of fault zones, stretching some portions of the crust and opening rifts in other places, according to a 2018 study in the journal Polar Science.

Illustration of the seismically active zone off Antactica. (CC BY 4.0: Cesca et al. 2022; nature Commun Earth Environ 3, 89 (2022); https://doi.org/10.1038/s43247-022-00418-5)

Illustration of the seismically active zone off Antactica. (CC BY 4.0: Cesca et al. 2022; nature Commun Earth Environ 3, 89 (2022); https://doi.org/10.1038/s43247-022-00418-5) (Image credit: Cesca et al. 2022, Communications Earth & Environment)

Scientists at the research stations on King George Island, one of the South Shetland Islands, were the first to feel  the rumblings of small quakes. Word soon got back to Cesca and his colleagues around the world, some of whom were collaborating on separate projects with the researchers on the island.

The team wanted to understand what was going on, but King George Island is remote, with just two seismic stations nearby, Cesca said. So the researchers used data from those seismic stations, as well as data from two ground stations for the global satellite navigation system, to measure ground displacement. They also looked at data from more far-flung seismic stations and from satellites circling Earth that use radar to measure shifting at ground level, the study authors reported April 11 in the journal Communications Earth & Environment.

The nearby stations are rather simple, but they were good for detecting the tiniest quakes. More distant stations, meanwhile, use more sophisticated equipment and can thus paint a more detailed picture of the larger quakes. By piecing these data together, the team was able to create a picture of the underlying geology that triggered this massive earthquake swarm, Cesca said.

The two largest earthquakes in the series were a magnitude 5.9 quake in October 2020 and a magnitude 6.0 quake in November. After the November quake, seismic activity waned. The quakes seemed to move the ground on King George Island around 4.3 inches (11 centimeters), the study found. Only 4% of that displacement could be directly explained by the earthquake; the scientists suspect the movement of magma into the crust largely accounts for the dramatic shifting of the ground.

“What we think is that the magnitude 6 somehow created some fractures and reduced the pressure of the magma dike,” Cesca said.

If there was an underwater eruption at the seamount, it likely happened at that time, Cesca added. But as of yet, there is no direct evidence for an eruption; to confirm that the massive shield volcano blew its top, scientists would have to send a mission to the strait to measure the bathymetry, or seafloor depth, and compare it to historical maps, he said.

Originally published on Live Science.

Previous Post

3 Florida correctional officers charged with murder in alleged beating of inmate – ABC News

Next Post

Fireball spotted over southern Mississippi, NASA confirms – ABC News

Related Posts

Octopuses torture and eat themselves after mating, and scientists finally know why – BGR
Tech

Octopuses torture and eat themselves after mating, and scientists finally know why – BGR

https://bgr.com/science/octopuses-torture-and-eat-themselves-after-mating-and-scientists-finally-know-why/

Read more
Boeing is trying again to launch its Starliner capsule to the space station — heres whats at stake – CNBC
Tech

Boeing is trying again to launch its Starliner capsule to the space station — heres whats at stake – CNBC

https://www.cnbc.com/2022/05/19/boeing-starliner-oft-2-launch-whats-at-stake.html

Read more
The Evolution of a Head Has Been Traced Back Surprisingly Far Back Our Ancestral Line – ScienceAlert
Tech

The Evolution of a Head Has Been Traced Back Surprisingly Far Back Our Ancestral Line – ScienceAlert

https://www.sciencealert.com/the-evolution-of-the-head-has-been-traced-back-to-our-closest-blob-like-ancestors

Read more
The 7 things you need to know for Thursday, May 19 – The Washington Post
Tech

The 7 things you need to know for Thursday, May 19 – The Washington Post

https://www.washingtonpost.com/the-seven/2022/05/19/what-to-know-for-may-19/

Read more
Gruesome Octopus Death Spiral: Bizarre Self-Mutilation in Mothers Linked to Cholesterol – SciTechDaily
Tech

Gruesome Octopus Death Spiral: Bizarre Self-Mutilation in Mothers Linked to Cholesterol – SciTechDaily

https://scitechdaily.com/gruesome-octopus-death-spiral-bizarre-self-mutilation-in-mothers-linked-to-cholesterol/

Read more
Load More
Next Post
Fireball spotted over southern Mississippi, NASA confirms – ABC News

Fireball spotted over southern Mississippi, NASA confirms - ABC News

  • Trending
  • Comments
  • Latest
‘Heartbroken’ Dog Doesn’t Understand Why His Family Is Leaving Him At The Shelter

‘Heartbroken’ Dog Doesn’t Understand Why His Family Is Leaving Him At The Shelter

Its a Type of Genotoxicity: Virologist Explains mRNA Vaccine Conversion to DNA – The Epoch Times

Its a Type of Genotoxicity: Virologist Explains mRNA Vaccine Conversion to DNA – The Epoch Times

Head of Luhansk Oblast Military Administration: Russians already scared to advance on Bilohorivka and no longer force their way across Siverskyi Donets – Yahoo News

Head of Luhansk Oblast Military Administration: Russians already scared to advance on Bilohorivka and no longer force their way across Siverskyi Donets – Yahoo News

Horror as goat gives birth to ‘humanoid kid’ with baby-like face

Egg prices could rise for UK consumers as farmers cut flock numbers | Eggs

‘All your friends were dying’: revisiting the horrors of the Aids crisis – The Guardian

‘All your friends were dying’: revisiting the horrors of the Aids crisis – The Guardian

Long COVID is crashing the retirement hopes of many Americans – MarketWatch

Long COVID is crashing the retirement hopes of many Americans – MarketWatch

A CDC expert answers questions on monkeypox – STAT

A CDC expert answers questions on monkeypox – STAT

About Us

Todayheadline the independent news and topics discovery
A home-grown and independent news and topic aggregation . displays breaking news linking to news websites all around the world.

Follow Us

Latest News

Egg prices could rise for UK consumers as farmers cut flock numbers | Eggs

‘All your friends were dying’: revisiting the horrors of the Aids crisis – The Guardian

‘All your friends were dying’: revisiting the horrors of the Aids crisis – The Guardian

Egg prices could rise for UK consumers as farmers cut flock numbers | Eggs

‘All your friends were dying’: revisiting the horrors of the Aids crisis – The Guardian

‘All your friends were dying’: revisiting the horrors of the Aids crisis – The Guardian

Long COVID is crashing the retirement hopes of many Americans – MarketWatch

Long COVID is crashing the retirement hopes of many Americans – MarketWatch

  • Real Estate
  • Education
  • Parenting
  • Cooking
  • Travel and Tourism
  • Home & Garden
  • Pets
  • Privacy & Policy
  • Contact
  • About

© 2021 All rights are reserved Todayheadline

No Result
View All Result
  • Real Estate
  • Education
  • Parenting
  • Cooking
  • Travel and Tourism
  • Home & Garden
  • Pets
  • Privacy & Policy
  • Contact
  • About

© 2021 All rights are reserved Todayheadline

Welcome Back!

Login to your account below

Forgotten Password?

Retrieve your password

Please enter your username or email address to reset your password.

Log In

Add New Playlist

Posting....