Thursday, September 27, 2012

C1 Flare From Newbie AR 1582 on Sept 26th...

The above X-ray image of the sun was taken September 27th at 03:48:00 UTC by the Solar X-ray Imager (SXI) aboard the GOES-15 satellite. Image Credit: NOAA

For the end of September 25th and most of September 26th, the solar activity was low. The new Active Region 1582 (AR 1582) rotated onto the southeast limb and produced the only C-class flare, a long duration C1, on the 26th at 12:40 UTC. No Earth-directed coronal mass ejections (CMEs) were observed. The forecast through September 29th: The solar activity is expected to be at low levels with a slight chance for an M-class flare.

Above earth, the geomagnetic field was quiet. The solar wind speed, measured at the Advanced Composition Explorer (ACE) spacecraft, increased from approximately 320 km/s to 450 km/s while the total magnetic field increased from 5 nT to 9 nT. The forecast through September 29th: The geomagnetic field is expected to be mostly quiet with a slight chance for unsettled periods. There is a slight chance for a greater than 10 MeV proton event. 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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