:Issued: 2004 Dec 24 1229 UTC :Product: documentation at http://sidc.oma.be/products/meu #------------------------------------------------------------------------------# # DAILY BULLETIN ON SOLAR AND GEOMAGNETIC ACTIVITY from the SIDC (RWC-Belgium) # #------------------------------------------------------------------------------# SIDC URSIGRAM 41224 SIDC SOLAR BULLETIN 24 Dec 2004, 1218UT SIDC FORECAST (valid from 1230UT, 24 Dec 2004 until 26 Dec 2004) SOLAR FLARES : Eruptive (C-class flares expected, probability >= 50%) GEOMAGNETISM : Quiet (A<20 and K<4) SOLAR PROTONS : Quiet PREDICTIONS FOR 24 Dec 2004 10CM FLUX: 098 / AP: 002 PREDICTIONS FOR 25 Dec 2004 10CM FLUX: 099 / AP: 002 PREDICTIONS FOR 26 Dec 2004 10CM FLUX: 101 / AP: 005 COMMENT: NOAA AR 0713, Catania sunspot group 90, is now situated close to the central meridian. It has produced several C-flares recently, including C5.1 flare yesterday, so there is a possibility of an Earth-directed CME. A low-latitude coronal hole in the northern hemisphere is now situated close to the central meridian. Disturbed geomagnetic conditions are possible in 2 - 3 days. The north - south component of the interplanetary magnetic field Bz is now close to zero, so we expect the geomagnetic situation to stay quiet in the coming hours. SOLAR INDICES FOR 23 Dec 2004 SUNSPOT INDEX : 038 10CM SOLAR FLUX : 096 AK CHAMBON LA FORET : 013 AK WINGST : /// ESTIMATED AP : 009 NOTICEABLE EVENTS SUMMARY DAY BEGIN MAX END LOC XRAY OP 10CM RADIO BURST TYPES Catania NOAA NOTE NONE END BT #------------------------------------------------------------------------------# # Solar Influences Data analysis Center - RWC Belgium # # Royal Observatory of Belgium # # Fax : 32 (0) 2 373 0 224 # # Tel.: 32 (0) 2 373 0 491 # # # # For more information, see http://sidc.oma.be. Please do not reply directly # # to this message, but send comments and suggestions to 'sidctech@oma.be'. # # If you are unable to use that address, use 'rvdlinden@spd.aas.org' instead. # #------------------------------------------------------------------------------#