Vaata laupäev, 20 november 1999 arhiivi

Päikese aktiivsuse aruanne

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.
Päikese ja geofüüsikalise aktiivsuse aruanne 1999 Nov 20 2200 UTC
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Ühine USAF / NOAA päikese- ja geofüüsikaalase aktiivsuse aruanne

SDF number 324 Välja antud 2200Z kuni 20 NOV 1999

IA. Päikese aktiivsete piirkondade ja päikeseaktiivsuse analüüs alates 19-2100Z kuni 20-2100Z

SOLAR ACTIVITY REMAINED AT LOW LEVELS. SEVERAL SUBFLARES OCCURRED DURING THE PERIOD, A FEW OF WHICH REACHED C-CLASS. REGION 8771 (S17E12) WAS RESPONSIBLE FOR MOST OF THE SUBFLARE ACTIVITY. IT SHOWED NO SIGNIFICANT CHANGES AND MAINTAINED A MIXED-POLARITY STRUCTURE, POSSIBLY INCLUDING A DELTA CONFIGURATION. REGION 8765 (S13W47) WAS STABLE, BUT REMAINED THE LARGEST AND MOST MAGNETICALLY COMPLEX GROUP ON THE DISK WITH STRONG DELTA CONFIGURATIONS OBSERVED WITHIN ITS INTERMEDIATE AND TRAILER SPOTS. REGION 8766 (N18W25) SHOWED A SLIGHT INCREASE IN MAGNETIC FIELD STRENGTH AND MAINTAINED A MIXED-POLARITY STRUCTURE, POSSIBLY INCLUDING A DELTA CONFIGURATION WITHIN ITS TRAILER SPOTS. REGION 8759 (N12W92) WAS STABLE AS IT DEPARTED THE WEST LIMB. NEW REGION 8776 (S31E24) WAS NUMBERED.
IB. Päikese aktiivsuse ennustus
SOLAR ACTIVITY IS EXPECTED TO BE MODERATE. REGIONS 8765, 8766, AND 8771 EACH APPEAR CAPABLE OF PRODUCING M-CLASS FLARES. THERE IS ALSO A CHANCE FOR A MAJOR FLARE DURING THE PERIOD, ESPECIALLY FROM REGION 8765.
IIA. Summaarne geofüüsikaline aktiivsus 19-2100Z kuni 20-2100Z
GEOMAGNETIC FIELD ACTIVITY RANGED FROM QUIET TO ACTIVE LEVELS. A UNSETTLED TO ACTIVE PERIOD OCCURRED DURING 20/0100 - 0300Z WITH MINOR STORM LEVELS DETECTED AT SOME HIGH LATITUDE STATIONS. THIS ACTIVITY FOLLOWED A BRIEF INCREASE IN SOLAR WIND VELOCITIES.
IIB. Geofüüsikalise aktiivsuse ennustus
GEOMAGNETIC ACTIVITY IS EXPECTED TO RANGE FROM UNSETTLED TO ACTIVE LEVELS. ACTIVE LEVELS ARE POSSIBLE ON DAY ONE IN RESPONSE TO RECENT CME ACTIVITY AND AGAIN ON DAY THREE DUE TO CORONAL HOLE EFFECTS.
III. Sündmuste tõenäosus 21 NOVkuni 23 NOV
Klass M80%80%80%
Klass X30%30%30%
Prooton20%20%20%
PCAFYELLOW
IV. Pikklaine 10.7 cm kiirgus
  Vaadeldud       20 NOV 204
  Prognoositud   21 NOV-23 NOV  200/200/190
  90 päeva keskmine        20 NOV 167
V. Geomagneetiline A-indeks
OBSERVED AFR/AP 19 NOV  009/012
ESTIMATED AFR/AP 20 NOV  012/012
PREDICTED AFR/AP 21 NOV-23 NOV  015/018-012/015-015/018
VI. Geomagnetilised aktiivsuse tõenäosused 21 NOV kuni 23 NOV
A. Keskmistel laiuskraadidel
Aktiivne30%20%35%
Väike torm15%10%15%
Suur-tõsine torm01%01%01%
B. Kõrgetel laiuskraadidel
Aktiivne40%30%40%
Väike torm20%15%20%
Suur-tõsine torm01%01%01%

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