Viewing archive of onsdag, 23 september 1998

Solaktivitetsrapport

Any mentioned solar flare in this report has a scaling factor applied by the Space Weather Prediction Center (SWPC). Because of the SWPC scaling factor, solar flares are reported as 42% smaller than for the science quality data. The scaling factor has been removed from our archived solar flare data to reflect the true physical units.
Rapport för sol- och geofysisk aktivitet 1998 Sep 23 2200 UTC
Skapad av NOAA © SWPC och bearbetad av SpaceWeatherLive.com

USAF/NOAA rapport för sol- och geofysisk aktivitet

SDF Nummer 266 publicerat klockan 2200Z på 23 SEP 1998

IA. Analys av solfläcksgrupper och solaktivitet från 22-2100Z till 23-2100Z

SOLAR ACTIVITY WAS HIGH DUE TO AN M6.9/3B FLARE THAT OCCURRED IN REGION 8340 (N20W02) AT 23/0713UT. THIS WAS A LONG DURATION EVENT THAT ALSO PRODUCED A TYPE II AND A TYPE IV SWEEP. THERE IS A FAIR POSSIBILITY THAT A PROTON EVENT WAS ALSO GENERATED DURING THIS ACTIVITY. REGION 8340 ALSO PRODUCED A C2 X-RAY FLARE AND 3 OPTICAL SUBFLARES DURING THE PERIOD. OTHER ACTIVE REGIONS WERE 8344 (S20E09) WHICH PRODUCED A C9/SF AT 23/0038UT AND REGION 8343 (N38E13) WHICH PRODUCED A SINGLE OPTICAL SUB FLARE DURING THE PERIOD. THE REST OF THE REGIONS WERE STABLE AND MOSTLY QUIET.
IB. Prognos för solaktivitet
SOLAR ACTIVITY IS EXPECTED TO BE LOW TO MODERATE. REGION 8340 CAN BE EXPECTED TO PRODUCE CONTINUED C-CLASS FLARES AND A POSSIBLE M-CLASS EVENT.
IIA. Sammanfattning av geofysisk aktivitet 22-2100Z till 23-2100Z
GEOMAGNETIC ACTIVITY WAS QUIET TO UNSETTLED.
IIB. Prognos för geofysisk aktivitet
THE GEOMAGNETIC FIELD IS EXPECTED TO BE QUIET TO UNSETTLED WITH POSSIBLE ACTIVE PERIODS AT HIGH LATITUDES. THERE IS A FAIR CHANCE OF A PROTON EVENT RESULTING FROM THE M6 FLARE AND THE ASSOCIATED TYPE II AND IV SWEEPS THAT OCCURRED ON 23/0713. PROJECTED ARRIVAL OF THE PROTON EVENT IS EARLY ON 24 SEPT AT AROUND 0300UT.
III. Chans för solutbrott från 24 SEP till 26 SEP
M-klass30%30%25%
X-klass05%05%01%
Proton05%05%01%
PCAFYELLOW
IV. Penticton 10.7 cm Flux
  Observerad       23 SEP 143
  Prognoserat   24 SEP-26 SEP  150/150/155
  90 Day Mean        23 SEP 129
V. Geomagnetiskt A-index
OBSERVED AFR/AP 22 SEP  006/010
ESTIMATED AFR/AP 23 SEP  012/012
PREDICTED AFR/AP 24 SEP-26 SEP  020/020-040/040-020/020
VI. Chanser för geomagnetisk aktivitet från 24 SEP till 26 SEP
A. Medelhöga breddgrader
Aktivt30%50%30%
Små stormförhållanden15%30%15%
Svåra stormförhållanden05%10%05%
B. Höga breddgrader
Aktivt50%65%50%
Små stormförhållanden10%30%10%
Svåra stormförhållanden01%05%01%

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