Viewing archive of måndag, 23 november 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 Nov 23 2200 UTC
Skapad av NOAA © SWPC och bearbetad av SpaceWeatherLive.com

USAF/NOAA rapport för sol- och geofysisk aktivitet

SDF Nummer 327 publicerat klockan 2200Z på 23 NOV 1998

IA. Analys av solfläcksgrupper och solaktivitet från 22-2100Z till 23-2100Z

SOLAR ACTIVITY REMAINED AT HIGH LEVELS. REGION 8384 (S26W101) PRODUCED ANOTHER MAJOR FLARE AS IT CONTINUED TO ROTATE BEYOND THE WEST LIMB. THE FLARE WAS AN X2/SF AT 23/0644UT WITH AN ASSOCIATED SIGNIFICANT TYPE IV RADIO SWEEP, A LOOP PROMINENCE SYSTEM, AND MODERATE DISCRETE FREQUENCY RADIO EMISSION. OPTICALLY UNCORRELATED, LOW-LEVEL M-CLASS X-RAY FLARES WERE DETECTED AT 22/2215UT AND 23/1121UT. A SPRAY REACHING 0.3 SOLAR RADII WAS SEEN ON THE NORTHEAST LIMB NEAR N20 AND WAS LIKELY ASSOCIATED WITH THE RETURN OF OLD REGION 8375 (N19, L = 185). A 200 SFU TENFLARE WAS DETECTED DURING THE SPRAY. NEW REGION 8393 (S18E71) WAS NUMBERED TODAY AS A SMALL D-TYPE. IT IS THE RETURN OF OLD REGION 8379, WHICH DID NOT PRODUCE SIGNIFICANT ACTIVITY DURING ITS LAST ROTATION. NO SIGNIFICANT GROWTH OR DECAY WAS NOTED IN THE REMAINING REGIONS.
IB. Prognos för solaktivitet
SOLAR ACTIVITY IS EXPECTED TO BE LOW TO MODERATE. M-CLASS FLARE PROBABILITIES MAY INCREASE UPON THE RETURN OF OLD REGION 8375, WHICH PRODUCED A MAJOR FLARE AND A SOLAR PROTON EVENT DURING ITS LAST ROTATION. THERE IS STILL A SMALL, BUT DIMINISHING CHANCE FOR AN ISOLATED M-CLASS FLARE FROM BEYOND THE SOUTHWEST LIMB.
IIA. Sammanfattning av geofysisk aktivitet 22-2100Z till 23-2100Z
THE GEOMAGNETIC FIELD WAS AT QUIET TO UNSETTLED LEVELS. THE PROTON FLUX ENHANCEMENT AT GT 10 MEV (THAT FOLLOWED YESTERDAY'S X3/1N FLARE) DECLINED TO BACKGROUND LEVELS.
IIB. Prognos för geofysisk aktivitet
THE GEOMAGNETIC FIELD IS EXPECTED TO BE AT UNSETTLED TO ACTIVE LEVELS DURING THE FIRST TWO DAYS, THEN DECLINE TO UNSETTLED LEVELS ON DAY THREE. THE GT 2 MEV ELECTRON FLUX MAY RISE TO HIGH LEVELS DURING THE LATTER HALF OF THE FORECAST PERIOD.
III. Chans för solutbrott från 24 NOV till 26 NOV
M-klass40%30%30%
X-klass10%01%01%
Proton10%01%01%
PCAFYELLOW
IV. Penticton 10.7 cm Flux
  Observerad       23 NOV 130
  Prognoserat   24 NOV-26 NOV  125/125/125
  90 Day Mean        23 NOV 131
V. Geomagnetiskt A-index
OBSERVED AFR/AP 22 NOV  006/007
ESTIMATED AFR/AP 23 NOV  010/009
PREDICTED AFR/AP 24 NOV-26 NOV  015/015-015/015-010/010
VI. Chanser för geomagnetisk aktivitet från 24 NOV till 26 NOV
A. Medelhöga breddgrader
Aktivt30%30%20%
Små stormförhållanden10%10%05%
Svåra stormförhållanden01%01%01%
B. Höga breddgrader
Aktivt40%40%20%
Små stormförhållanden10%10%05%
Svåra stormförhållanden01%01%01%

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