:Issued: 2008 Apr 28 1251 UTC :Product: documentation at http://www.sidc.be/products/meu #--------------------------------------------------------------------# # DAILY BULLETIN ON SOLAR AND GEOMAGNETIC ACTIVITY from the SIDC # # (RWC Belgium) # #--------------------------------------------------------------------# SIDC URSIGRAM 80428 SIDC SOLAR BULLETIN 28 Apr 2008, 1209UT SIDC FORECAST (valid from 1230UT, 28 Apr 2008 until 30 Apr 2008) SOLAR FLARES : Quiet conditions (<50% probability of C-class flares) GEOMAGNETISM : Quiet (A<20 and K<4) SOLAR PROTONS : Quiet PREDICTIONS FOR 28 Apr 2008 10CM FLUX: 068 / AP: 017 PREDICTIONS FOR 29 Apr 2008 10CM FLUX: 068 / AP: 015 PREDICTIONS FOR 30 Apr 2008 10CM FLUX: 068 / AP: 013 COMMENT: The coronal hole influencing the earth magnetic field from April 05 until April 13 is restructured. A small, though equatorial part is approaching a geoeffective position. The halo/partial halo CME observed with the LASCO coronagraphs onboard SOHO on April 26th at 15:08UT (LASCO C2) is expected to arrive on April 30. Flaring conditions are quiet. TODAY'S ESTIMATED ISN : 000, BASED ON 10 STATIONS. SOLAR INDICES FOR 27 Apr 2008 WOLF NUMBER CATANIA : /// 10CM SOLAR FLUX : 068 AK CHAMBON LA FORET : /// AK WINGST : 009 ESTIMATED AP : 011 ESTIMATED ISN : 000, BASED ON 22 STATIONS. 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.be/products/meu # # 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. # # To unsubscribe, visit http://sidc.be/registration/unsub.php # #--------------------------------------------------------------------#