Viewing archive of lördag, 8 augusti 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 Aug 08 2200 UTC
Skapad av NOAA © SWPC och bearbetad av SpaceWeatherLive.com

USAF/NOAA rapport för sol- och geofysisk aktivitet

SDF Nummer 220 publicerat klockan 2200Z på 08 AUG 1998

IA. Analys av solfläcksgrupper och solaktivitet från 07-2100Z till 08-2100Z

SOLAR ACTIVITY INCREASED TO MODERATE. AN UNOBSERVED M3 X-RAY FLARE OCCURRED AT 0317Z. TYPE II SWEEP AND MODERATE DISCRETE RADIO BURSTS ACCOMPANIED THE EVENT. FREQUENT LOW-LEVEL C-CLASS FLARES FROM REGIONS 8293 (S22W05) AND 8299 (N16E64) WERE COMMONPLACE DURING THE PERIOD. BOTH OF THESE REGIONS ARE IMPRESSIVE IN WHITE LIGHT AND H-ALPHA, AND SHOW NO SIGNS OF ABATING THEIR FLARE ACTIVITY. IN THE EARLY HOURS OF 08 AUGUST, A VERY PROMINENT, CENTRALLY-LOCATED FILAMENT MEASURING APPROXIMATELY 30 DEGREES DISAPPEARED. THIS FEATURE WAS ORIENTED NORTH-SOUTH AND CENTERED NEAR N30E00. IT IS LIKELY THAT THIS WAS A SYMPTOM OF A MASS EJECTION HIGHER IN THE CORONA. ELSEWHERE, THE REMAINING FOUR SPOTTED REGIONS EXHIBITED LITTLE ACTIVITY, AND THE LIMBS WERE QUIET.
IB. Prognos för solaktivitet
SOLAR ACTIVITY IS EXPECTED TO BE LOW TO MODERATE. REGIONS 8293 AND 8299 ARE BOTH GOOD CANDIDATES FOR CONTINUED OCCASIONAL M-CLASS EVENTS.
IIA. Sammanfattning av geofysisk aktivitet 07-2100Z till 08-2100Z
THE GEOMAGNETIC FIELD WAS QUIET TO ACTIVE. SHORT-LIVED SUBSTORMS OCCURRED DURING LOCAL NIGHTTIME HOURS.
IIB. Prognos för geofysisk aktivitet
THE GEOMAGNETIC FIELD IS EXPECTED TO BE QUIET TO UNSETTLED THE NEXT 72 HOURS. TODAY'S DSF/CME EVENT IS NOT EXPECTED TO AFFECT THE FIELD BEFORE 12 AUGUST.
III. Chans för solutbrott från 09 AUG till 11 AUG
M-klass40%40%40%
X-klass10%10%10%
Proton10%10%10%
PCAFGREEN
IV. Penticton 10.7 cm Flux
  Observerad       08 AUG 147
  Prognoserat   09 AUG-11 AUG  150/150/145
  90 Day Mean        08 AUG 110
V. Geomagnetiskt A-index
OBSERVED AFR/AP 07 AUG  024/028
ESTIMATED AFR/AP 08 AUG  013/013
PREDICTED AFR/AP 09 AUG-11 AUG  010/012-005/010-005/015
VI. Chanser för geomagnetisk aktivitet från 09 AUG till 11 AUG
A. Medelhöga breddgrader
Aktivt30%10%10%
Små stormförhållanden10%05%05%
Svåra stormförhållanden01%01%01%
B. Höga breddgrader
Aktivt40%20%20%
Små stormförhållanden20%10%10%
Svåra stormförhållanden05%05%05%

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