Sun 

Sun Emits a Solstice CME

On June 20, 2013, at 11:24 p.m., the sun erupted with an Earth-directed coronal mass ejection or CME, a solar phenomenon that can send billions of tons of particles into space that can reach Earth one to three days later. These particles cannot travel through the atmosphere to harm humans on Earth, but they can affect electronic systems in satellites and on the ground.

Experimental NASA research models, based on observations from NASA's Solar Terrestrial Relations Observatory and ESA/NASA's Solar and Heliospheric Observatory show that the CME left the sun at speeds of around 1350 miles per second, which is a fast speed for CMEs.

Earth-directed CMEs can cause a space weather phenomenon called a geomagnetic storm, which occurs when they funnel energy into Earth's magnetic envelope, the magnetosphere, for an extended period of time. The CME's magnetic fields peel back the outermost layers of Earth's fields changing their very shape. Magnetic storms can degrade communication signals and cause unexpected electrical surges in power grids. They also can cause aurora. Storms are rare during solar minimum, but as the sun's activity ramps up every 11 years toward solar maximum—currently expected in late 2013—large storms occur several times per year.

In the past, geomagnetic storms caused by CMEs of this strength and direction have usually been mild.

In addition, the CME may pass by additional spacecraft: Messenger, STEREO B, Spitzer, and their mission operators have been notified. If warranted, operators can put spacecraft into safe mode to protect the instruments from the solar material.


For More Information

http://www.nasa.gov/mission_pages/sunearth/news/News062013-cme.html#.UegtH1NCX0g


Credits

Tom Bridgman (GST): Lead Animator
Scott Wiessinger (USRA): Video Editor
Scott Wiessinger (USRA): Producer
Karen Fox (ASI): Writer
Please give credit for this item to:
NASA's Goddard Space Flight Center

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Mission:
SDO

Data Used:
SDO/AIA/304 Filter
SDO/AIA/171 Filter
SDO/AIA/131 Filter

This item is part of this series:
Heliophysics Breaking News

Goddard TV Tape:
G2013-021 -- 2013 Heliophysics Breaking News

Keywords:
SVS >> CME
SVS >> Coronal Mass Ejection
SVS >> HDTV
SVS >> Solar Flare
SVS >> Solar Ultraviolet
SVS >> Sun
SVS >> SDO
SVS >> Solar Dynamics Observatory
SVS >> Heliophysics
SVS >> Corona
NASA Science >> Sun