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Three CMEs in 2 Days

sun mercury cme soho

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#1    Waspie_Dwarf

Waspie_Dwarf

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    Oscar Wilde

Posted 20 April 2013 - 10:25 PM

CME Headed Toward Planet Mercury


www.nasa.gov said:

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This image of a coronal mass ejection (CME) was captured at 7:30 a.m. EDT on April 20, 2013. The CME is headed in the direction of Mercury. The large bright spot on the left is Venus.
Credit: ESA&NASA/SOHO


On April 20, 2013, at 2:54 a.m. EDT, the sun erupted with a coronal mass ejection (CME), a solar phenomenon that can send billions of tons of solar particles into space that can affect electronic systems in satellites. Experimental NASA research models show that the CME left the sun at 500 miles per second and is not Earth-directed. However, it may pass by NASA's Messenger and STEREO-A satellites, and their mission operators have been notified. There is, however, no particle radiation associated with this event, which is what would normally concern operators of interplanetary spacecraft since the particles can trip computer electronics on board. When warranted, NASA operators can put spacecraft into safe mode to protect the instruments from the solar material



What is a solar flare? What is a CME?

For answers to these and other space weather questions, please visit the Spaceweather Frequently Asked Questions page.

Related Links

View Past Solar Activity


Karen C. Fox
NASA Goddard Space Flight Center, Greenbelt, MD


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"Space is big. Really big. You just won't believe how vastly, hugely, mind-boggingly big it is. I mean, you may think it's a long way down the street to the chemist, but that's just peanuts to space." - The Hitch-Hikers Guide to the Galaxy - Douglas Adams 1952 - 2001

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#2    Waspie_Dwarf

Waspie_Dwarf

    Space Cadet

  • 34,215 posts
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  • Location:Bexleyheath, Kent, UK

  • We are all in the gutter, but some of us are looking at the stars.

    Oscar Wilde

Posted 22 April 2013 - 02:27 PM

www.nasa.gov said:

UPDATE: 04.21.13, first update

The same region of the sun erupted with another coronal mass ejection (CME) at 3:54 a.m. on April 21, 2013. Experimental NASA research models show the CME left the sun at speeds of 550 miles per second. The models show that the CME will also pass by NASA’s Messenger and the flank of the CME may graze STEREO-A. The Messenger and STEREO mission operators have been notified. There may be some particle radiation associated with this event, which in the worst case scenarios can impact computer electronics on board interplanetary spacecraft. If warranted, operators can put spacecraft into safe mode to protect the instruments from the solar material.

Updates will be provided as needed.

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Edited by Waspie_Dwarf, 22 April 2013 - 02:27 PM.
typo.

"Space is big. Really big. You just won't believe how vastly, hugely, mind-boggingly big it is. I mean, you may think it's a long way down the street to the chemist, but that's just peanuts to space." - The Hitch-Hikers Guide to the Galaxy - Douglas Adams 1952 - 2001

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#3    Waspie_Dwarf

Waspie_Dwarf

    Space Cadet

  • 34,215 posts
  • Joined:03 Mar 2006
  • Gender:Male
  • Location:Bexleyheath, Kent, UK

  • We are all in the gutter, but some of us are looking at the stars.

    Oscar Wilde

Posted 22 April 2013 - 02:30 PM

www.nasa.gov said:

UPDATE: 04.21.13, second update

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The third coronal mass ejection (CME) in two days erupted off the sun in the direction of Mercury on April 21, 2013, at 12:39 p.m. EDT. This image of the CME, shown shooting off the left side of the image, was capture by the joint ESA and NASA Solar Heliospheric Observatory (SOHO). The sun is blocked in this image so its brightness doesnt obscure the solar atmosphere, the corona.
Credit: ESA&NASA/SOHO


Another coronal mass ejection (CME) has erupted from the sun, headed toward Mercury and NASAs Messenger spacecraft. The CME began at 12:39 p.m. EDT on April 21, 2013. Experimental NASA research models show that the CME left the sun at 625 miles per second and that it will catch up to the CME from earlier on April 21 before the combined CMEs pass Messenger. There is also chance that the combined CMEs will give a glancing blow to STEREO-A. The Messenger and STEREO mission operators have been notified. There may be some particle radiation associated with this event, which in the worst case scenarios can impact computer electronics on board interplanetary spacecraft. If warranted, operators can put spacecraft into safe mode to protect the instruments from the solar material.

Posted Image Source


"Space is big. Really big. You just won't believe how vastly, hugely, mind-boggingly big it is. I mean, you may think it's a long way down the street to the chemist, but that's just peanuts to space." - The Hitch-Hikers Guide to the Galaxy - Douglas Adams 1952 - 2001

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