NASA's STEREO detects a CME from the sun

May 17, 2013
NASA's STEREO detects a CME from the sun
A combined view of the coronal mass ejection, or CME, that occurred on May 17, 2013, at 5:36 EDT. The center yellow image was captured by NASA's Solar Dynamics Observatory and shows the sun as seen in UV light, in the 171 Angstrom wavelength. The SDO image is superimposed on top of an image from the Solar and Heliospheric Observatory showing the CME propagating into space. Credit: NASA/SDO/Goddard, ESA&NASA SOHO

On 5:24 a.m. EDT on May 17, 2013, the sun erupted with an Earth-directed coronal mass ejection or CME, a solar phenomenon that can send billions of tons of solar particles into space that can reach Earth one to three days later and affect electronic systems in satellites and on the ground. Experimental NASA research models, based on observations from NASA's Solar Terrestrial Relations Observatory, show that the CME left the sun at speeds of around 745 miles per second. The solar material in CMEs cannot pass through the atmosphere to affect humans on Earth.

Not to be confused with a solar flare, a CME can cause a space weather phenomenon called a geomagnetic storm, which occurs when they connect with the outside of the Earth's magnetic envelope, the magnetosphere, for an extended period of time.

The CME may also pass by Spitzer and its mission operators have been notified. If warranted, operators can put spacecraft into safe mode to protect the instruments from the solar material.

Explore further: Sun spits out two CMEs

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Jeddy_Mctedder
1 / 5 (2) May 18, 2013
"the solar material cannot pass through the earths atmosphere to affect humans on earth"

right . i love it when you can tell people who right this stuff are totally unversed in their subjects.

what's exciting is there have been a number of flares in the past week. perhaps there will be a spate of many more in the weeks to come. eventually one could devastate a couple sattelites or maybe cause a blackout by shorting some powerlines and transformers if we're unlucky.

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