Viewing archive of söndag, 30 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 30 2200 UTC
Skapad av NOAA © SWPC och bearbetad av SpaceWeatherLive.com

USAF/NOAA rapport för sol- och geofysisk aktivitet

SDF Nummer 242 publicerat klockan 2200Z på 30 AUG 1998

IA. Analys av solfläcksgrupper och solaktivitet från 29-2100Z till 30-2100Z

SOLAR ACTIVITY WAS MODERATE. THE MAJORITY OF TODAY'S ACTIVITY CAME FROM REGION 8319 (N18W41) WHICH PRODUCED TWO M-CLASS FLARES: AN M1/1N AT 0541Z AND AN M1/1N AT 0937Z. THE REGION GREW RAPIDLY OVER THE LAST 24 HOURS, MORE THAN DOUBLING IN SIZE, AND PRODUCED VERY FREQUENT SUBFLARE ACTIVITY. THE SUNSPOT DISTRIBUTION APPEARS TO BE TRANSITIONING FROM AN INTERMEDIATE TO COMPACT CONFIGURATION. A THIRD M-CLASS EVENT (M1/SN WITH AN ASSOCIATED TYPE II SWEEP) WAS PRODUCED BY 8307 (N30W65) AT 1805Z. ALL THREE OF TODAY'S M-CLASS FLARES WERE SHORT-LIVED, IMPULSIVE EVENTS. REGION 8323 (S21E54) HAS ROTATED INTO VIEW AS A LARGE (700-800 MILLIONTHS), COMPACT SUNSPOT GROUP. MAGNETIC OBSERVATIONS INDICATE A MIXING OF MAGNETIC POLARITY INCLUDING A PROBABLE DELTA CONFIGURATION IN THE REGION.THE GROUP PRODUCED A NUMBER OF SUBFLARE EVENTS DURING THE PAST 24 HOURS.
IB. Prognos för solaktivitet
SOLAR ACTIVITY IS EXPECTED TO BE MOSTLY MODERATE, BUT THERE IS A FAIR CHANCE FOR A MAJOR FLARE EVENT OVER THE NEXT THREE DAYS FROM ANY ONE OF REGIONS 8307, 8319, AND 8323.
IIA. Sammanfattning av geofysisk aktivitet 29-2100Z till 30-2100Z
THE GEOMAGNETIC FIELD HAS BEEN UNSETTLED TO ACTIVE. HIGH SPEED (500-580 KM/S), LOW DENSITY (1-3 P/CC) SOLAR WIND PERSISTED OVER THE LAST 24 HOURS, AND WAS ACCOMPANIED BY A FLUCTUATING, BUT MOSTLY NEGATIVE BZ INTERPLANETARY MAGNETIC FIELD COMPONENT (RANGING FROM +2 TO -5 NT). THE GREATER THEN 2 MEV ELECTRON FLUXES CONTINUE TO BE HIGH.
IIB. Prognos för geofysisk aktivitet
THE GEOMAGNETIC FIELD IS EXPECTED TO BE MOSTLY UNSETTLED WITH OCCASIONAL ACTIVE PERIODS FOR THE NEXT THREE DAYS.
III. Chans för solutbrott från 31 AUG till 02 SEP
M-klass85%85%85%
X-klass25%25%25%
Proton35%35%35%
PCAFGREEN
IV. Penticton 10.7 cm Flux
  Observerad       30 AUG 163
  Prognoserat   31 AUG-02 SEP  170/170/165
  90 Day Mean        30 AUG 119
V. Geomagnetiskt A-index
OBSERVED AFR/AP 29 AUG  011/018
ESTIMATED AFR/AP 30 AUG  015/015
PREDICTED AFR/AP 31 AUG-02 SEP  015/015-015/015-010/015
VI. Chanser för geomagnetisk aktivitet från 31 AUG till 02 SEP
A. Medelhöga breddgrader
Aktivt35%30%20%
Små stormförhållanden05%05%05%
Svåra stormförhållanden01%01%01%
B. Höga breddgrader
Aktivt45%30%25%
Små stormförhållanden25%20%15%
Svåra stormförhållanden05%05%05%

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