Tuesday, September 25, 2012

Two C1 Flares on September 24th...

The above image was taken September 24th at 15:42:00 UTC by the Atmospheric Imaging Assembly (AIA), at 94 Angstroms, aboard the Solar Dynamics Observatory (SDO). This was during the time of a C1 solar flare, produced by Active Region 1578 (AR 1578), to the east (left) of center on the disc. Image Credit: SDO/AIA

For the end of September 23rd and most of September 24th, the solar activity was low. The new Active Region 1578 (AR 1578), produced a C1 flare on the 24th at 15:42 UTC. And an undesignated region, just rotating onto the Earth-facing disc, produced a C1 flare on the 24th at 19:31 UTC. Another region rotating onto the southeast limb was designated AR 1579. No Earth-directed coronal mass ejections (CMEs) were observed. The forecast through September 27th: The solar activity is expected to be low with a slight chance for M-class flares.

At home, the geomagnetic field was quiet. The forecast through September 27th: The geomagnetic field is expected to be mostly quiet. On the 26th and 27th, the greater than 10 MeV proton probability increases to a slight chance due to potential activity 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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