The Sun Online and solar activity. December 29, 2013

There were one M flare and nine C flares on the Sun during the past 24 hours. The M3.1 flare was released by NOAA AR 11936, and peaked at 07:56 UT on December 29. The probability for C flares over the next 48 hours is very high (around 95%) and for M flares around 55%. There is a slight chance for an X flare, especially from AR 11936.  The > 10 MeV proton flux as observed by GOES13 started rising near 18:50 UT on December 28. It exceeded the threshold level of 10 pfu around 21:50 UT, and attained a peak value of 29 pfu at 23:15 UT. It went under the 10 pfu threshold again at 7:50 UT on
December 29, and is further decreasing. The > 50 MeV and > 100 MeV proton flux have also increased, but have not exceeded the 10 pfu threshold. This proton event is most probably associated with the halo CME first observed by LASCO C2 at 17:36 UT on December 28, which is probably linked to a backsided eruption. A warning condition for further proton storms is issued.Around 13h UT on December 28, the   olar wind speed as observed by ACE suddenly increased above its plateau of around 300 km/s, and gradually rose further to a plateau of around 370 km/s. During the past 24 hours, the magnitude of the Interplanetary Magnetic Field varied between about 3 nT and 9 nT. A continuation of nominal solar wind conditions is expected on December 29-31. Geomagnetic activity has been quiet over the past 24 hours
(NOAA Kp between 1 and 2). Quiet geomagnetic conditions (K Dourbes < 4) are expected on December 29, 30, and 31, with a slight chance of active conditions (K Dourbes = 4) in the first half of December 30 (in case the Earth suffers a glancing blow from the CME first observed by LASCO C2 at 7:36 UT on December 26).
SIDC

Equipment: Coronado 90 + SBIG 8300s + LX75
Processing: Photoshop
Date: 12/29/13
Time UT: 17:00
Exposure 0.8 sec.

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