Wednesday, September 26, 2012

AR 1580's C4 Flare on Sept 25th...

The above X-ray image of the sun was taken September 26th at 01:48:00 UTC by the Solar X-ray Imager (SXI) aboard the GOES-15 satellite. Image Credit: NOAA

For the end of September 24th and most of September 25th, the solar activity was low. The largest flare was a C4 flare on the 25th at 17:53 UTC from Active Region 1580 (AR 1580). AR 1581 was designated. No Earth-directed coronal mass ejections (CMEs) were observed. The forecast through September 28th: The solar activity is expected to continue at low levels with a slight chance for M-class flares.

Above Earth, the geomagnetic field was quiet. The forecast through September 28th: The geomagnetic field is expected to continue at mostly quiet conditions.  There is a slight chance for a greater than 10 MeV proton event from active regions rotating around the southeast limb. Stay tuned...

To monitor solar flare activity minute by minute, visit the "Today's Space Weather" page of NOAA's Space Weather Prediction Center (

To learn more about the sun and to stay current on solar activity, visit the mission home pages of the Solar Dynamics Observatory (SDO) (, the Solar and Heliospheric Observatory (SOHO) (, the Advanced Composition Explorer (ACE) (, and the Solar Terrestrial Relations Observatory (STEREO) (


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