northanger (northanger) wrote,

returning sunspot #720 (now #732)

INFO FROM SIDC - RWC BELGIUM Sun Feb 6 2005, 1115 UT

The returning sunspot group Catania 05/NOAA 0720 has now rotated into view. Since yesterday\'s forecast, it only produced a C1.2 flare, but we expect higher activity levels over the next few days. On the disk itself, a new sunspot group has formed (Catania 18), but this is far not very active. Another sunspot group is lying in wait behind the southeast limb (possibly the return of Catania 11/NOAA 0725), and produced a C1.3 flare a short while ago. Solar activity is expected to continue at least a C-flare level, with a good chance for an M-class event. The solar wind speed is increasing, probably due to the small equatorial coronal hole in the western hemisphere. This influence is expected to last for about a day. Since the IMF orientation is varying, we may get short periods of active conditions. Another, much larger coronal hole in the northern hemisphere is now at central meridian. This recurrent coronal hole may lead to minor storm conditions from Feb 09 onwards. [SIDC]

Analysis of Solar Active Regions and Activity from 05/2100Z to 06/2100Z: Solar activity remained at low levels today. Region 732 (N09E70, believed to be old Region 720) was numbered today and was the source for the largest flare of the period, a C1 x-ray flare that occurred at 06/0939Z. Analysis of the magnetic field structure indicates a fair amount of complexity over a large are of plage while the sunspot area coverage is currently meager. New Region 731 (S02E27) was also numbered today. Solar Activity Forecast: Solar activity is expected to be at low levels. Region 732 could continue the production of C-class flare activity. [Feb 06 Report of Solar-Geophysical Activity]

More info on asteroids #731 SORGA & #732 TJILAKI coming soon.


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