Viewing archive of Saturday, 27 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 27 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 086 Issued at 2200Z on 27 MAR 1999IA. Analysis of Solar Active Regions and Activity from 26-2100Z to 27-2100Z SOLAR ACTIVITY CONTINUED VERY LOW. TWO NEW REGIONS WERE
ASSIGNED. THEY ARE 8500 (N15E03) AND 8501 (N27E67).
IB. Solar Activity Forecast
SOLAR ACTIVITY IS EXPECTED TO REMAIN
VERY LOW.
IIA. Geophysical Activity Summary 26-2100Z to 27-2100Z
THE GEOMAGNETIC FIELD WAS QUIET.
IIB. Geophysical Activity Forecast
THE GEOMAGNETIC FIELD IS
EXPECTED TO BE QUIET TO UNSETTLED. A HIGH SPEED SOLAR WIND STREAM
MAY IMPACT THE MAGNETOSPHERE ON DAY 3 OF THE INTERVAL.
III. Event Probabilities 28 MAR to 30 MAR
| Class M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | GREEN | ||
IV. Penticton 10.7 cm Flux
Observed 27 MAR 105 Predicted 28 MAR-30 MAR 105/110/110 90 Day Mean 27 MAR 140
V. Geomagnetic A Indices
OBSERVED AFR/AP 26 MAR 007/006 ESTIMATED AFR/AP 27 MAR 004/005 PREDICTED AFR/AP 28 MAR-30 MAR 005/008-010/008-015/015
VI. Geomagnetic Activity Probabilities 28 MAR to 30 MAR
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 10% | 20% | 25% |
| Minor storm | 05% | 10% | 15% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 10% | 20% | 25% |
| Minor storm | 05% | 10% | 15% |
| Major-severe storm | 01% | 01% | 01% |
All times in UTC
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