SIDC URSIGRAM 30728
SIDC SOLAR BULLETIN 28 Jul 2003, 1230UT
SIDC FORECAST (valid from 1230UT, 28 Jul 2003 until 30 Jul 2003)
SOLAR FLARES  : Eruptive (C-class flares expected, probability >= 50%)
GEOMAGNETISM  : Minor geomagnetic storm expected (A>=30 or K=5)
SOLAR PROTONS : Quiet
PREDICTIONS FOR 28 Jul 2003  10CM FLUX: 104 / AP: 025
PREDICTIONS FOR 29 Jul 2003  10CM FLUX: 106 / AP: 022
PREDICTIONS FOR 30 Jul 2003  10CM FLUX: 107 / AP: 024
COMMENT: Geomagnetic conditions have been quiet since noon UT time yesterday.
The solar wind speed decreased to about 550km/s at 10UT this morning, but has
just started to increase again due to the effect of a coronal hole in
geo-effective position. We expect geomagnetic conditions to go up to minor storm
level by the end of the UT day. Solar activity has continued at very low level
the past 24 hours, but also looks set to increase, with the rapid growth out of
the blue of the new sunspot group 81, and the appearance of the active sunspot
group 83 at the eastern limb. We therefore expect a high likelihood of C-class
flares.

SOLAR INDICES FOR 27 Jul 2003
SUNSPOT INDEX       : 047
10CM SOLAR FLUX     : 102
AK CHAMBON LA FORET : 029
AK WINGST           : 024
ESTIMATED AP        : 025

NOTICEABLE EVENTS SUMMARY
DAY BEGIN MAX  END  LOC   XRAY OP 10CM     TYPE          Catania NOAA NOTE
NONE
END
BT