SOLAR ACTIVITY UPDATE: (Another) 4th X-Class Solar Flare/CME (May 15th, 2013).
Skyywatcher88 .
2013-05-16
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ANOTHER X-FLARE ON MAY 15: When the week began, the sun hadn't unleashed an X-flare all year long. In only two days, sunspot AR1748 has produced four. The latest X-flare from this active sunspot occured on May 15th at 0152 UT. NASA's Solar Dynamics Observatory captured the extreme ultraviolet flash: http://www.spaceweather.com/
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