Viewing archive of Saturday, 29 April 2000
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 2000 Apr 29 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 120 Issued at 2200Z on 29 APR 2000IA. Analysis of Solar Active Regions and Activity from 28-2100Z to 29-2100Z SOLAR ACTIVITY WAS LOW. REGION 8970 (S15W36) PRODUCED
TWO MINOR C-CLASS FLARES DURING THE PERIOD. REGION 8976 (S11W14)
PRODUCED A LONG DURATION C3/SF AT 29/1203UT, THIS WAS THE LARGEST
EVENT NOTED TODAY. REGION 8971(N18W36) PRODUCED AN OPTICAL SUBFLARE
AT 29/1710UT. OTHER THAN THE ACTIVITY DESCRIBED ABOVE, THE SUN WAS
FAIRLY QUIET AND STABLE DURING THE PERIOD.
IB. Solar Activity Forecast
SOLAR ACTIVITY IS EXPECTED TO CONTINUE
TO BE LOW.
IIA. Geophysical Activity Summary 28-2100Z to 29-2100Z
THE GEOMAGNETIC FIELD WAS QUIET TO UNSETTLED.
IIB. Geophysical Activity Forecast
THE GEOMAGNETIC FIELD IS
EXPECTED TO BE QUIET TO UNSETTLED.
III. Event Probabilities 30 APR to 02 MAY
| Class M | 30% | 30% | 30% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | GREEN | ||
IV. Penticton 10.7 cm Flux
Observed 29 APR 175 Predicted 30 APR-02 MAY 175/175/180 90 Day Mean 29 APR 189
V. Geomagnetic A Indices
OBSERVED AFR/AP 28 APR 011/017 ESTIMATED AFR/AP 29 APR 012/010 PREDICTED AFR/AP 30 APR-02 MAY 010/010-010/010-010/010
VI. Geomagnetic Activity Probabilities 30 APR to 02 MAY
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 20% | 20% | 20% |
| Minor storm | 05% | 05% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 30% | 30% | 30% |
| Minor storm | 05% | 05% | 05% |
| Major-severe storm | 01% | 01% | 01% |
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