SIDC URSIGRAM 40528
SIDC SOLAR BULLETIN 28 May 2004, 1230UT
SIDC FORECAST (valid from 1230UT, 28 May 2004 until 30 May 2004)
SOLAR FLARES  : Active (M-class flares expected, probability >= 50%)
GEOMAGNETISM  : Quiet (A<20 and K<4)
SOLAR PROTONS : Quiet
PREDICTIONS FOR 28 May 2004  10CM FLUX: 104 / AP: 008
PREDICTIONS FOR 29 May 2004  10CM FLUX: 106 / AP: 003
PREDICTIONS FOR 30 May 2004  10CM FLUX: 108 / AP: 007
COMMENT: Sunspot group Catania 34 (NOAA 0618) finally started to show C-flare
activity. This UT-morning it already produced a C4.2 flare. We expect further
flaring activity from this region. On 27/5 at about 12:36 UT a filament eruption
was seen across the central meridian. No halo CME has been detected. The solar
wind speed stays constant around 380 km/s. Due to a mild but negative Bz (-5) we
expect the K-index to enhance slightly the coming hours, but conditions are
expected to remain mostly quiet.



SOLAR INDICES FOR 27 May 2004
SUNSPOT INDEX       : 073
10CM SOLAR FLUX     : 102
AK CHAMBON LA FORET : 008
AK WINGST           : ///
ESTIMATED AP        : 005

NOTICEABLE EVENTS SUMMARY
DAY BEGIN MAX  END  LOC   XRAY OP 10CM     TYPE          Catania NOAA NOTE
28  1004 1011 1013 S10W43 C4.2                                32  0618 SXI derived location
END
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