coronal ejections found to be \sunquake\ trigger
Last Updated : GMT 09:03:51
Almaghrib Today, almaghrib today
Almaghrib Today, almaghrib today
Last Updated : GMT 09:03:51
Almaghrib Today, almaghrib today

Huge belches of charged particles cause quakes

Coronal ejections found to be 'sunquake' trigger

Almaghrib Today, almaghrib today

Almaghrib Today, almaghrib today Coronal ejections found to be 'sunquake' trigger

New "sunquake" trigger found
London - Arabstoday

New "sunquake" trigger found Powerful earthquake-like events on the sun's surface, called sunquakes, can be set off by huge belches of charged particles from the solar atmosphere, scientists say. Researchers had previously linked sunquakes to solar flares, eruptions on the sun that can send powerful bursts of x-rays, ultraviolet light, and matter into space.
On February 15, 2011, researchers spied two sunquakes and a solar flare that occurred around the same time—but the flare wasn't hot enough to have spawned the seismic waves.
"The heat and radiation from solar flares is thought to drive a pressure wave to the surface, like thunder from a lightning bolt. But for this February 15th event, it wasn't like that," said Sergei Zharkov, a space scientist at University College London, who presented the new findings about sunquakes last month at the 2012 National Astronomy Meeting in Manchester, U.K.
Instead it appears the February sunquakes were linked to a coronal mass ejection, or CME, a huge cloud of charged solar particles that erupted from the sun's upper atmosphere.
"This is the first time we've seen a sunquake associated with a coronal mass ejection," Zharkov said. "It's the first clear counterexample."
Solar researchers in 1972 predicted the existence of sunquakes, which look like the circular ripples on a pond's surface after someone tosses in a stone.
It wasn't until 1998, however, that a team of scientists announced the first observed sunquake, found in 1996 data from NASA's Solar and Heliospheric Observatory. The 11.3-magnitude sunquake occurred following a solar flare, and it was 40,000 times more powerful than the 1906 San Francisco earthquake.
Zharkov and his team measured February 2011's set of sunquakes as each being a thousand times more energetic than last year's Tohoku earthquake in east Japan.
But instead of coming from a flare, the new sunquakes seemed to emanate from the ends of a contorted magnetic rope connected to the sun's surface, also the source of the observed CME.
Zharkov and colleagues' new observations suggest that several other forces—not just hot pressure from a solar flare—might trigger the sun's seismic events.
"One possibility is that jets of particles from coronal mass ejections might push the solar atmosphere down and cause sunquakes," Zharkov said.
Another theory is that piled-up magnetic field lines might send acoustic waves rippling through the sun's atmosphere. When these waves impact the solar surface and subsurface, the thinking goes, the reverberations could trigger sunquakes.
"At this point," Zharkov said, "we don't understand the mechanics [behind sunquakes]. The exact physical processes remain a mystery."
To wrestle the unknowns, Zharkov needs to see more sunquakes and gather additional data.
The good news for researchers such as Zharkov is that the sun is close to its 2013 solar maximum—the peak of a roughly 11-year cycle in solar activity.
In addition, more and better sun-monitoring satellites are in place now than ever before.
The "most beautiful data," Zharkov said, comes from NASA's Solar Dynamics Observatory (SDO), which launched in 2010. That spacecraft will provide the best views yet of increasingly common sunquakes, he said.
"These sunquakes," Zharkov said, "are part of the puzzle of flares and coronal mass ejections, which have the most direct impact on space weather" that can disrupt satellites and cause auroras.
Zharkov's ultimate dream is to use sunquakes to "see" inside the sun, in much the same way seismologists use earthquakes to probe inside our planet.
"Sunquakes travel through the solar interior and contain some info about it," he said. "We'd like to capture that information to see below the sun's surface."

almaghribtoday
almaghribtoday

Name *

E-mail *

Comment Title*

Comment *

: Characters Left

Mandatory *

Terms of use

Publishing Terms: Not to offend the author, or to persons or sanctities or attacking religions or divine self. And stay away from sectarian and racial incitement and insults.

I agree with the Terms of Use

Security Code*

coronal ejections found to be \sunquake\ trigger coronal ejections found to be \sunquake\ trigger

 



Name *

E-mail *

Comment Title*

Comment *

: Characters Left

Mandatory *

Terms of use

Publishing Terms: Not to offend the author, or to persons or sanctities or attacking religions or divine self. And stay away from sectarian and racial incitement and insults.

I agree with the Terms of Use

Security Code*

coronal ejections found to be \sunquake\ trigger coronal ejections found to be \sunquake\ trigger

 



Almaghrib Today, almaghrib today Skincare PR Performance Full Year 2017

GMT 09:22 2018 Monday ,22 January

Skincare PR Performance Full Year 2017
Almaghrib Today, almaghrib today New hunt for flight MH370 gets under way

GMT 11:03 2018 Wednesday ,24 January

New hunt for flight MH370 gets under way
Almaghrib Today, almaghrib today Modern colorful bedroom renovation

GMT 10:57 2017 Thursday ,21 December

Modern colorful bedroom renovation
Almaghrib Today, almaghrib today Puigdemont candidate for Catalan president

GMT 13:56 2018 Tuesday ,23 January

Puigdemont candidate for Catalan president
Almaghrib Today, almaghrib today Turkey detains dozens more

GMT 10:47 2018 Wednesday ,24 January

Turkey detains dozens more

GMT 12:48 2011 Monday ,04 July

Gilbert favourite for win number 2 on Tour

GMT 08:12 2017 Wednesday ,15 February

UAE, Pakistan can benefit from CPEC, says envoy

GMT 09:07 2016 Friday ,19 August

Gawker.com to shut down next week

GMT 03:39 2012 Saturday ,04 August

Shyamalan, Noxon team up for Syfy pilot

GMT 20:13 2012 Friday ,21 December

We need a new cabinet to solve the crisis

GMT 10:01 2014 Thursday ,31 July

Kirstie Alley's TV Land series canceled

GMT 08:15 2016 Thursday ,29 December

Why Don’t We Conserve Water?

GMT 10:58 2011 Sunday ,17 July

IMF urges Europe to bolster lenders

GMT 18:21 2011 Wednesday ,29 June

Zarkana\': Cirque du Soleil debuts new gamble in NY

GMT 11:24 2013 Wednesday ,24 July

Living room interior decoration ideas

GMT 08:35 2012 Thursday ,24 May

Ancient jewellery found in Israel

GMT 14:32 2011 Friday ,16 September

The Fat Years

GMT 11:32 2015 Tuesday ,06 January

Why are there spots on my apple?
Almaghrib Today, almaghrib today
 
 Almaghrib Today Facebook,almaghrib today facebook  Almaghrib Today Twitter,almaghrib today twitter Almaghrib Today Rss,almaghrib today rss  Almaghrib Today Youtube,almaghrib today youtube  Almaghrib Today Youtube,almaghrib today youtube

Maintained and developed by Arabs Today Group SAL.
All rights reserved to Arab Today Media Group 2021 ©

Maintained and developed by Arabs Today Group SAL.
All rights reserved to Arab Today Media Group 2021 ©

.almaghribtoday .almaghribtoday .almaghribtoday .almaghribtoday
almaghribtoday almaghribtoday almaghribtoday
almaghribtoday
بناية النخيل - رأس النبع _ خلف السفارة الفرنسية _بيروت - لبنان
almaghribtoday, Almaghribtoday, Almaghribtoday