Viewing archive of Tuesday, 23 March 1999
Solar activity report
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.
Report of Solar-Geophysical Activity 1999 Mar 23 2200 UTCPrepared 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 1999IA. 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 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 M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | GREEN | ||
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 | |||
|---|---|---|---|
| Active | 25% | 25% | 15% |
| Minor storm | 15% | 15% | 10% |
| Major-severe storm | 05% | 05% | 05% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 25% | 25% | 15% |
| Minor storm | 15% | 15% | 10% |
| Major-severe storm | 10% | 10% | 05% |
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