SIDC URSIGRAM 50204 SIDC SOLAR BULLETIN 04 Feb 2005, 1206UT SIDC FORECAST (valid from 1230UT, 04 Feb 2005 until 06 Feb 2005) SOLAR FLARES : Eruptive (C-class flares expected, probability >= 50%) GEOMAGNETISM : Quiet (A<20 and K<4) SOLAR PROTONS : Quiet PREDICTIONS FOR 04 Feb 2005 10CM FLUX: 090 / AP: 002 PREDICTIONS FOR 05 Feb 2005 10CM FLUX: 094 / AP: 005 PREDICTIONS FOR 06 Feb 2005 10CM FLUX: 097 / AP: 007 COMMENT: Flaring activity from the sun has still remained very low during the past 24 hours. The new region in the southeast, now numbered Catania sunspot group 17 (no NOAA number yet) is still flaring, but only at the B-level. In EIT images we can now see the loop system of the returning sunspot group Catania 05/NOAA 0720. These images indicate there is still activity going on there, but so far it doesn't appear to be major. A prominence erupted from the northern solar hemisphere at about 04:00UT on Feb 03. No strong corresponding CME was observed in LASCO, and since the prominence was also fairly far to the north, we expect no geomagnetic effect from that eruption. The solar wind speed is still near 500 km/s and slowly declining. There has been so far no trace of an ICME corresponding to the filament eruption of Feb 01. Geomagnetic conditions are quiet and are expected to remain so for the next 48 hours, after which we may see active to minor storm conditions due to a small equatorial coronal hole that is currently just west of the central meridian. SOLAR INDICES FOR 3 Feb 2005 SUNSPOT INDEX : 014 10CM SOLAR FLUX : 083 AK CHAMBON LA FORET : /// AK WINGST : /// ESTIMATED AP : 010 NOTICEABLE EVENTS SUMMARY DAY BEGIN MAX END LOC XRAY OP 10CM RADIO BURST TYPES Catania NOAA NOTE NONE END BT