Viewing archive of Sunday, 10 September 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 Sep 10 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 254 Issued at 2200Z on 10 SEP 2000IA. Analysis of Solar Active Regions and Activity from 09-2100Z to 10-2100Z SOLAR ACTIVITY HAS BEEN LOW. THE LARGEST EVENT OF THE
DAY WAS A C1/SF FLARE AT 10/0010 UTC, FROM REGION 9158 (N29E32).
X-RAY FLUX SINCE THEN HAS REMAINED AT BACKGROUND LEVELS, EXHIBITING
ONLY B-CLASS FLARING.
IB. Solar Activity Forecast
SOLAR ACTIVITY IS EXPECTED TO BE LOW.
REGIONS 9158 AND 9154 (S17W75) ARE MOST LIKELY SOURCES FOR C-CLASS
FLARES. ISOLATED CHANCES FOR M-CLASS ACTIVITY STILL EXIST FROM
REGIONS 9154 AND 9151 (N10W87) UNTIL THEY TRANSIT THE WEST LIMB.
IIA. GEOPHYSICAL ACTIVITY SUMMARY 09/2100Z TO 10/2100Z:
THE GEOMAGNETIC FIELD HAS BEEN AT QUIET LEVELS THROUGHOUT THE PERIOD.
IIB. Geophysical Activity Forecast
THE GEOMAGNETIC FIELD IS
EXPECTED TO REMAIN AT QUIET TO UNSETTLED LEVELS, WITH AN INCREASING
CHANCE OF ACTIVE LEVELS NEAR THE END OF DAY ONE, DUE TO ANTICIPATED
SHOCK ARRIVAL FROM THE CME ACTIVITY NOTED ON 09/0849 UTC. ACTIVE
LEVELS ARE EXPECTED FOR DAY TWO AND INTO DAY THREE. A CHANCE FOR
ISOLATED PERIODS OF MINOR STORMING DURING SHOCK PASSAGE ALSO EXISTS.
III. Event Probabilities 11 SEP to 13 SEP
| Class M | 25% | 20% | 20% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | GREEN | ||
IV. Penticton 10.7 cm Flux
Observed 10 SEP 141 Predicted 11 SEP-13 SEP 140/135/130 90 Day Mean 10 SEP 180
V. Geomagnetic A Indices
OBSERVED AFR/AP 09 SEP 006/007 ESTIMATED AFR/AP 10 SEP 004/007 PREDICTED AFR/AP 11 SEP-13 SEP 018/020-020/020-012/012
VI. Geomagnetic Activity Probabilities 11 SEP to 13 SEP
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 35% | 40% | 30% |
| Minor storm | 15% | 20% | 15% |
| Major-severe storm | 05% | 05% | 05% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 35% | 40% | 35% |
| Minor storm | 20% | 20% | 15% |
| Major-severe storm | 05% | 05% | 05% |
All times in UTC
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