Viser arkiv af tirsdag, 5 maj 1998

Solaktivitetsrapport

Ethvert nævnt soludbrud i denne rapport har en skaleringsfaktor anvendt af Space Weather Prediction Center (SWPC). På grund af SWPC-skaleringsfaktoren rapporteres soludbrud som 42 % mindre end for videnskabelige kvalitetsdata. Skaleringsfaktoren er blevet fjernet fra vores arkiverede soludbrudsdata for at afspejle de sande fysiske enheder.
Rapport om sol-geofysisk aktivitet 1998 May 05 2200 UTC
Udarbejdet af NOAA © SWPC og behandlet af SpaceWeatherLive.com

Fælles USAF/NOAA-rapport om sol- og geofysisk aktivitet

SDF nummer 125 Udstedt til 2200Z på 05 MAY 1998

IA. Analyse af solaktive områder og aktivitet fra 04-2100Z til 05-2100Z

SOLAR ACTIVITY HAS BEEN LOW. THE DAY'S EVENTS CONSISTED OF OCCASIONAL C-CLASS FLARES. THE LARGEST OF THESE WAS A C7.3 AT 1938Z. THE SOURCE FOR MOST OF THE ACTIVITY WAS REGION 8214 (N27W31). THIS REGION IS GROWING AND HAS BRIGHT PLAGE WITH FREQUENT FLUCTUATIONS. OBSERVERS ARE REPORTING GROWTH AND DEVELOPMENT OF PENUMBRA IN THE INTERMEDIATE SPOTS. THE CURRENT MAGNETIC CONFIGURATION IS MORE COMPLEX TODAY (BETA-GAMMA) AND THE REGION IS BECOMING COMPACT. REGION 8210 (S17W60) WAS RELATIVELY CALM TODAY, SHOWED A SLIGHT INCREASE IN AREA, BUT WAS REPORTED TO PRODUCE ONLY A FEW SUBFLARES.
IB. Solaktivitetsprognose
SOLAR ACTIVITY IS EXPECTED TO BE MODERATE. THERE IS A GOOD CHANCE FOR AN M-CLASS EVENT FROM REGION 8214. THERE IS ALSO A POSSIBILITY FOR A MAJOR FLARE FROM THIS REGION, ESPECIALLY IF THE CURRENT TRENDS CONTINUE. REGION 8210 CONTINUES TO POSE A FAIR M-CLASS THREAT AS WELL.
IIA. Geofysisk aktivitetsoversigt 04-2100Z til 05-2100Z
THE GEOMAGNETIC FIELD HAS RANGED FROM UNSETTLED TO MAJOR STORM LEVELS OVER THE PAST 24 HOURS. AN INITIALLY UNSETTLED TO ACTIVE FIELD BECAME DISTURBED BETWEEN 0300-0700Z, WITH MAJOR STORM CONDITIONS OBSERVED AT MID AND HIGH LATITUDE STATIONS. FROM 0700-2100Z THE FIELD HAS BEEN CHARACTERIZED BY PREDOMINANTLY ACTIVE LEVELS, WITH SOME MINOR STORM PERIODS AT THE HIGH LATITUDE STATIONS. THE MAJOR GEOMAGNETIC STORM THAT BEGAN WITH THE SSC OF 04/0300Z OFFICIALLY ENDED AT 05/0900UT. THE CURRENT ACTIVITY IS ASSOCIATED WITH THE X1/3B/HALO CME EVENT OF 02/1342Z. THIS EVENT WAS INITIALLY SEEN AT ACE AS A STRONG SHOCK AT 04/0229Z FOLLOWED BY A PERIOD OF NEGATIVE BZ FROM 04/0230-0430Z. THE SOLAR WIND DATA HAVE CONTINUED TO SHOW CHARACTERISTICS OF TRANSIENT FLOW OVER THE PAST 24 HOURS, NAMELY STRONG MAGNETIC FIELDS, VARIABLE TEMPERATURES, AND VARIABLE BUT HIGH VELOCITIES. THE FLOW DOES NOT SHOW THE 'CLASSIC CLOUD' STRUCTURE, SUGGESTING THAT THE DRIVER MISSED HITTING THE EARTH DIRECTLY. THE GREATER THAN 2 MEV ELECTRONS EXCEEDED HIGH LEVELS DURING THE PAST 24 HOURS.
IIB. Geofysisk aktivitetsprognose
THE GEOMAGNETIC FIELD IS EXPECTED TO BE PREDOMINANTLY ACTIVE FOR THE NEXT 24-36 HOURS DUE TO LINGERING EFFECTS OF THE CURRENT DISTURBANCE. CONDITIONS SHOULD RETURN TO UNSETTLED TO QUIET THEREAFTER.
III. Hændelsessandsynligheder 06 MAY til 08 MAY
Klasse M75%75%75%
Klasse X20%20%20%
Proton20%20%20%
PCAFYELLOW
IV. Penticton 10,7 cm Flux
  Observeret       05 MAY 133
  Forudsagt   06 MAY-08 MAY  135/135/130
  90 dages gennemsnit        05 MAY 106
V. Geomagnetiske A-indekser
OBSERVED AFR/AP 04 MAY  090/096
ESTIMATED AFR/AP 05 MAY  025/035
PREDICTED AFR/AP 06 MAY-08 MAY  020/025-015/020-005/013
VI. Geomagnetisk aktivitetssandsynlighed 06 MAY til 08 MAY
A. Mellemste breddegrader
Aktiv20%20%10%
Mindre storm10%05%05%
Større-alvorlig storm10%05%05%
B. Høje breddegrader
Aktiv25%25%10%
Mindre storm10%05%05%
Større-alvorlig storm10%05%05%

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