Viewing archive of tisdag, 4 november 1997

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 1997 Nov 04 2200 UTC
Skapad av NOAA © SWPC och bearbetad av SpaceWeatherLive.com

USAF/NOAA rapport för sol- och geofysisk aktivitet

SDF Nummer 308 publicerat klockan 2200Z på 04 NOV 1997

IA. Analys av solfläcksgrupper och solaktivitet från 03-2100Z till 04-2100Z

SOLAR ACTIVITY BECAME HIGH. REGION 8100 (S21W38) PRODUCED AN X2/2B AT 04/0558Z. THIS EVENT HAD A 690 F.U. BURST AT 10 CM AND TYPE II/IV BURSTS. A HALO CORONAL MASS EJECTION WAS OBSERVED FOLLOWING THIS EVENT. THIS FLARE WAS PRECEDED BY AN M1 (NO OPTICAL) AT 04/0135Z AND AN M4/1F FROM REGION 8100 AT 04/0242Z. REGION 8100 ALSO PRODUCED MANY C-CLASS EVENTS. REGION 8100 CONTINUED TO GROW DURING THE PERIOD BUT AT A REDUCED RATE FROM THAT EXHIBITED ON 03 NOV. AREAL COVERAGE BECAME APPROXIMATELY 1000 MILLIONTHS DURING THE PERIOD. HOWEVER, SEVERAL AREAS THAT WERE EXHIBITING MIXED POLARITIES YESTERDAY ARE NOW FADING RESULTING IN A MORE BIPOLAR CONFIGURATION OF THE REGION. THE DELTA CONFIGURATION REMAINED BUT APPARENTLY IS WEAKENING. A NEW REGION EMERGED AT A RAPID PACE NEAR N24E10, WAS NUMBERED AS NEW REGION 8103, AND PRODUCED SEVERAL SUBFLARES.
IB. Prognos för solaktivitet
SOLAR ACTIVITY SHOULD BE PREDOMINANTLY MODERATE. REGION 8100 REMAINS POTENT BUT THE DECREASE IN MAGNETIC COMPLEXITY ARGUES STRONGLY THAT FLARE FREQUENCY AND PEAK FLARE FLUX SHOULD ABATE SLIGHTLY. LARGE M-CLASS OR SMALL X-CLASS FLARES COULD OCCUR BUT ONLY INFREQUENTLY.
IIA. Sammanfattning av geofysisk aktivitet 03-2100Z till 04-2100Z
THE GEOMAGNETIC FIELD WAS PREDOMINANTLY QUIET TO UNSETTLED. BRIEF ACTIVE CONDITIONS WERE OBSERVED IN THE 04/1500-1800Z PERIOD. A GREATER THAN 10 MEV PROTON EVENT BEGAN AT 04/0640Z, PASSED THE 10 PFU THRESHOLD AT 04/0830Z, AND REACHED A MAXIMUM OF 72 PFU AT 04/1120Z. THEREAFTER, GREATER THAN 10 MEV PROTON FLUXES SLOWLY DECLINED AND AT THE END OF THE PERIOD WERE AT 16 PFU. THE GREATER THAN 100 MEV PROTON FLUX REACHED A MAXIMUM OF 2.6 PFU AT 04/0930Z. POLAR CAP ABSORPTION DURING THIS EVENT WAS ESTIMATED TO HAVE BEEN 2.6 DB WITH A MAXIMUM AT APPROXIMATELY 04/1300Z.
IIB. Prognos för geofysisk aktivitet
THE GEOMAGNETIC FIELD SHOULD BE UNSETTLED TO SLIGHTLY ACTIVE ON 05 NOV. ACTIVE TO MINOR STORM CONDITIONS SHOULD BEGIN ON 06 NOV AS A RESULT OF A HALO CME OBSERVED ON 03 NOV. MAJOR STORM CONDITIONS ARE FORECAST FOR 07 NOV FROM THE X2 EVENT AND HALO CME OBSERVED ON 04 NOV. ISOLATED SEVERE STORMING IS POSSIBLE ON 07 NOV. ANOTHER PROTON EVENT IS POSSIBLE SHOULD REGION 8100 PRODUCE AN ADDITIONAL MAJOR FLARE. HOWEVER, AS MENTIONED ABOVE, ONLY ISOLATED MAJOR FLARES ARE EXPECTED IN THE NEAR FUTURE.
III. Chans för solutbrott från 05 NOV till 07 NOV
M-klass70%70%70%
X-klass25%25%25%
Proton25%25%25%
PCAFIN PROGRESS
IV. Penticton 10.7 cm Flux
  Observerad       04 NOV 118
  Prognoserat   05 NOV-07 NOV  121/122/120
  90 Day Mean        04 NOV 089
V. Geomagnetiskt A-index
OBSERVED AFR/AP 03 NOV  003/003
ESTIMATED AFR/AP 04 NOV  008/010
PREDICTED AFR/AP 05 NOV-07 NOV  015/020-025/035-050/060
VI. Chanser för geomagnetisk aktivitet från 05 NOV till 07 NOV
A. Medelhöga breddgrader
Aktivt20%25%25%
Små stormförhållanden10%30%25%
Svåra stormförhållanden05%15%30%
B. Höga breddgrader
Aktivt20%25%20%
Små stormförhållanden20%35%30%
Svåra stormförhållanden05%20%35%

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