Having been quiet for a couple weeks, the Sun is now waking up with new sunspot 1226 - expecting to throw of C- class solar flares.
May 28 2011, 1130 UT
Solar activity picked up significantly now NOAA AR 1225 and 1226 are turning over the east limb of the Sun. This last region was responsible for 5 C-class flares yesterday and produced 8 more C-class flares today. The strongest of these was a a C8.3 flare peaking at 03h15 this morning. A CME was detected by STEREO A and B yesterday around 18h09, possibly linked to the C5.6 flare from AR 1226. We expect more C-class flares, also an M flare is possible.
We are currently experiencing a geomagnetic storm with local Dourbes and planetary K indices reaching up to 5 and 6 respectively. These geomagnetic storm conditions are caused by the arrival of a high wind stream from a recurrent coronal hole and possibly also the arrival of a CME that occurred on May 25th. The solar wind speed is ~500 km/s and the southward component of the magnetic field reached a value of -10 nT. In the coming hours more active periods are expected
Now: Kp= 6 storm
24-hr max: Kp= 6 storm
Earth is entering a solar wind stream flowing
from the indicated coronal hole. Credit: SDO/AIA.