Viewing archive of Tuesday, 23 March 1999

Solar activity report

Report of Solar-Geophysical Activity 1999 Mar 23 2200 UTC
Prepared by the NOAA © SWPC and processed by SpaceWeatherLive.com

Joint USAF/NOAA Report of Solar and Geophysical Activity

SDF Number 082 Issued at 2200Z on 23 MAR 1999

IA. Analysis of Solar Active Regions and Activity from 22-2100Z to 23-2100Z

SOLAR ACTIVITY WAS VERY LOW. ONLY A COUPLE OF LOW-LEVEL B-CLASS X-RAY FLARES OCCURRED. NO OPTICAL FLARE REPORTS WERE RECEIVED. ALL DISK REGIONS ARE SMALL AND SIMPLE. NEW REGION 8498 (N18E67) ROTATED AROUND THE EAST LIMB AS A SINGLE H-TYPE SUNSPOT.
IB. Solar Activity Forecast
SOLAR ACTIVITY IS EXPECTED TO BE VERY LOW TO LOW. IIA. GEOPHYSICAL ACTIVITY SUMMARY FROM 22/2100Z TO 23/2100Z: THE GEOMAGNETIC FIELD WAS QUIET.
IIB. Geophysical Activity Forecast
THE GEOMAGNETIC FIELD IS EXPECTED TO BE QUIET TO UNSETTLED. ACTIVITY LEVELS MAY INCREASE DUE TO A DSF AND ASSOCIATED CME THAT OCCURRED ON 21 MARCH.
III. Event Probabilities 24 MAR to 26 MAR
Class M01%01%01%
Class X01%01%01%
Proton01%01%01%
PCAFGREEN
IV. Penticton 10.7 cm Flux
  Observed       23 MAR 113
  Predicted   24 MAR-26 MAR  110/110/115
  90 Day Mean        23 MAR 141
V. Geomagnetic A Indices
OBSERVED AFR/AP 22 MAR  003/003
ESTIMATED AFR/AP 23 MAR  005/005
PREDICTED AFR/AP 24 MAR-26 MAR  015/010-015/010-010/010
VI. Geomagnetic Activity Probabilities 24 MAR to 26 MAR
A. Middle Latitudes
Active25%25%15%
Minor storm15%15%10%
Major-severe storm05%05%05%
B. High Latitudes
Active25%25%15%
Minor storm15%15%10%
Major-severe storm10%10%05%

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