SIDC URSIGRAM 50202 SIDC SOLAR BULLETIN 02 Feb 2005, 1236UT SIDC FORECAST (valid from 1230UT, 02 Feb 2005 until 04 Feb 2005) SOLAR FLARES : Quiet conditions (<50% probability of C-class flares) GEOMAGNETISM : Quiet (A<20 and K<4) SOLAR PROTONS : Quiet PREDICTIONS FOR 02 Feb 2005 10CM FLUX: 083 / AP: 006 PREDICTIONS FOR 03 Feb 2005 10CM FLUX: 085 / AP: 004 PREDICTIONS FOR 04 Feb 2005 10CM FLUX: 089 / AP: 018 COMMENT: Solar activity has remained low over the past 24 hours. The solar X-ray flux has remained below B-level all the time. Solar conditions are expected to remain quiet for the next 48 hours. After that, we expect the return of Catania sunpot group 05 (NOAA 0720). Geomagnetic conditions are quiet also. The solar wind speed is decreasing and the IMF is near zero. A large CME was detected in LASCO images at 11:06 UT on Feb 01. It was mostly eastwards directed and determined to be backsided. However, just before this time, a coronal dimming was clearly visible in EIT images, while near the same time the low energy proton fluxes (as measured by ACE/EPAM) started to rise. This may indicate that a weak frontsided CME occurred at the same time, which may cause some geomagnetic perturbations late tomorrow. SOLAR INDICES FOR 1 Feb 2005 SUNSPOT INDEX : 030 10CM SOLAR FLUX : 084 AK CHAMBON LA FORET : /// AK WINGST : /// ESTIMATED AP : 008 NOTICEABLE EVENTS SUMMARY DAY BEGIN MAX END LOC XRAY OP 10CM RADIO BURST TYPES Catania NOAA NOTE NONE END BT