Archief bekijken van zondag 24 januari 1999

Activiteitenrapport

Rapport van de zonne- en geofysische activiteit van 1999 Jan 24 2200 UTC
Opgemaakt door de NOAA © SWPC en verwerkt door Poollicht.be

USAF/NOAA rapport van de zonneactiviteit en geofysische activiteit

SDF Nummer 024 gepubliceerd omstreeks 2200Z op 24 JAN 1999

IA. Analyse van de actieve zonneregio's en zonneactiviteit van 23-2100Z tot 24-2100Z

SOLAR ACTIVITY WAS LOW. THE LARGEST EVENT OF THE PERIOD WAS A C5/SF FLARE FROM REGION 8444 (N20W38) AT 24/0820Z. A MORE INTERESTING EVENT WAS A GRADUAL RISE AND FALL C3 X-RAY EVENT FROM 24/1555-1920Z. A REPORT WAS RECEIVED OF CORONAL RAIN AND A WEAK LOOP PROMINENCE SYSTEM VISIBLE NEAR SW28 TOWARD THE END OF THE X-RAY EVENT. NO SIGNIFICANT FLARE WAS OBSERVED IN NEARBY REGION 8439 (S23W81) DURING THE EVENT BUT, IN MOVIE SEQUENCES, FIBRIL DISTORTIONS WERE. IT IS LIKELY THAT A FILAMENT ERUPTED BEHIND THE WEST LIMB AND SOME MATERIAL FLOWED DOWN ALONG FIELD LINES NEAR REGION 8439. REGIONS 8439 AND 8440 (N19W78) SHOWED SLIGHT DECAY BUT THAT MAY BE DUE IN PART TO FORESHORTENING.
IB. Voorspelling zonneactiviteit
SOLAR ACTIVITY SHOULD BE PREDOMINANTLY LOW FOR THE NEXT THREE DAYS DUE TO SUBFLARES FROM REGIONS 8439, 8440, AND 8444. REGIONS 8439 AND 8440 REMAIN CAPABLE OF PRODUCING ISOLATED M-CLASS EVENTS. IIA. GEOPHYSICAL ACTIVITY SUMMARY FROM 23/2100Z TO 24/2100Z: DURING THE FIRST HALF OF THE PERIOD, THE GEOMAGNETIC FIELD WAS AT UNSETTLED TO ACTIVE LEVELS. QUIET TO UNSETTLED CONDITIONS WERE OBSERVED DURING THE LATTER HALF. THE GT 10 MEV PROTON FLUX REMAINED ENHANCED BUT BELOW EVENT LEVEL FOR THE ENTIRE PERIOD. A FORBUSH DECREASE BEGAN EARLY ON 23 JAN. THE NEUTRON FLUX DURING THE EVENT WAS DEPRESSED BY APPROXIMATELY 6 PERCENT NEAR MIDDAY ON 24 JAN. AT THE END OF THE PERIOD, THE FORBUSH DECREASE WAS SLOWLY RECOVERING TO NORMAL VALUES.
IIB. Voorspelling geofysische activiteit
THE GEOMAGNETIC FIELD SHOULD BE QUIET TO UNSETTLED FOR THE NEXT THREE DAYS. THE GT 10 MEV PROTON FLUX SHOULD RETURN TO BACKGROUND LEVELS DURING THE PERIOD.
III. Kans zonnevlammen van 25 JAN tot 27 JAN
Klasse M40%20%15%
Klasse X10%05%05%
Proton10%05%05%
PCAFGREEN
IV. Penticton 10.7 cm Flux
  Geobserveerd       24 JAN 162
  Voorspelt   25 JAN-27 JAN  153/142/137
  90 Day Mean        24 JAN 143
V. Geomagnetische A index
OBSERVED AFR/AP 23 JAN  017/016
ESTIMATED AFR/AP 24 JAN  013/015
PREDICTED AFR/AP 25 JAN-27 JAN  008/010-008/010-010/008
VI. Kansen geomagnetische activiteit van 25 JAN tot 27 JAN
A. Gemiddelde breedtegraad
Actief15%10%15%
Kleine stormcondities05%05%05%
Zware-ernstige stormcondities01%01%01%
B. Hoge breedtegraad
Actief20%15%15%
Kleine stormcondities05%05%05%
Zware-ernstige stormcondities01%01%01%

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