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OK0NAG > SOLAR 30.05.10 17:43l 114 Lines 4106 Bytes #999 (0) @ EU
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Subj: GEOALERT SIDC
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Date: Sun, 30 May 2010 12:55:27 GMT
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Subject: GEOALERT SIDC
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:Issued: 2010 May 30 1254 UTC
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#--------------------------------------------------------------------#
# GEOALERT message from the SIDC (RWC-Belgium) #
#--------------------------------------------------------------------#
GEOALERT BRU150
UGEOA 30512 00530 1236/ 9930/
10302 21302 30302
99999
PLAIN
NOTE: the above forecasts are valid from 1230UT, 30 May 2010 until 01 Jun
2010
PREDICTIONS FOR 30 May 2010 10CM FLUX: 075 / AP: 022
PREDICTIONS FOR 31 May 2010 10CM FLUX: 074 / AP: 019
PREDICTIONS FOR 01 Jun 2010 10CM FLUX: 074 / AP: 016
COMMENT: An isolated C-class flare in one of the three sunspot groups
on the Sun (NOAA ARs 1073, 1074 and 1075) is possible but unlikely. A
solar wind discontinuity (possibly a weak shock wave) was detected by
ACE and CELIAS around 21:20 UT on May 29. Following this discontinuity,
the plasma was heated and the the interplanetary magnetic field became
oscillating, that is characteristic for post-shock sheaths. The
discontinuity also marked the end of the magnetic cloud that arrived to
ACE late on May 28. The interplanetary magnetic field is currently
elevated (around 10 nT) indicating a possible ICME structure associated
with the partial halo CME on May 24. The solar wind speed is still low
(400 - 450 km/s), so the possible ICME sheath structure produced only
active geomagnetic conditions (as reported by IZMIRAN and NOAA). The
solar wind speed increased in the last several hours. This may indicate
the imminent arrival of the fast solar wind stream from a low-latitude
extension of the northern polar coronal hole. Active geomagnetic
conditions are possible in the coming hours, with isolated minor storm
intervals possible but unlikely.
TODAY'S ESTIMATED ISN : 021, BASED ON 02 STATIONS.
99999
UGEOI 30512 00530 1236/ 29///
10036 20740 3025/ 4//// 80103 90050
99999
NOTICEABLE EVENTS SUMMARY
DAY BEGIN MAX END LOC XRAY OP 10CM RADIO BURST TYPES Catania
NOAA NOTE
NONE
END
UGEOR 30512 00530 1236/ 29/08 30103
10074 2//// 3//// 471// 50010 60001 38414 00000
10076 2//// 3//// 4311/ 50020 60002 14112 01000
10077 2//// 3//// 4311/ 50020 60003 20718 00000
99999
USSPS 32404 29071 ///22 32003 14412 21403 33002 44820 20801 34001
20621 21302
USSPS 21305 29157 ///42 39004 13913 01206 40002 45318 01203 41004
20220 01206
UMAGF 30503 00530 0955/ 29062 1/028 23323 34333
UMAGF 31523 00530 ///// 2900/ 1/025 23443 34453
#--------------------------------------------------------------------#
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# Royal Observatory of Belgium #
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# #
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