Viewing archive of Saturday, 30 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 30 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 274 Issued at 2200Z on 30 SEP 2000IA. Analysis of Solar Active Regions and Activity from 29-2100Z to 30-2100Z SOLAR ACTIVITY WAS MODERATE. IT IS BELIEVED REGION
9178 (S23E40) PRODUCED A SLOW RISE, LONG DURATION M1 X-RAY EVENT
THAT REACHED MAXIMUM AT 30/1827Z. A SECOND M1 X-RAY EVENT OCCURRED
AT 30/2016Z WITH NO OPTICAL CORRELATION. REGIONS 9173 (S11W02) AND
9178 PRODUCED SEVERAL C-CLASS EVENTS DURING THE PERIOD. GROWTH WAS
OBSERVED IN REGIONS 9173, 9176 (S09E31), AND 9178. REGION 9176 NOW
HAS A BETA-GAMMA MAGNETIC CONFIGURATION WITH APPROXIMATELY 24 SPOTS.
NEW REGION 9179 (N34E07) WAS NUMBERED TODAY.
IB. Solar Activity Forecast
SOLAR ACTIVITY IS EXPECTED TO BE LOW
TO MODERATE. REGIONS 9173, 9176 (S09E31), AND 9178 EACH HAVE THE
POTENTIAL TO PRODUCE AN M-CLASS EVENT.
IIA. GEOPHYSICAL ACTIVITY SUMMARY 29/2100Z TO 30/2100Z:
THE GEOMAGNETIC FIELD RANGED FROM QUIET TO MAJOR STORM LEVELS. A
DISTURBANCE OF UNKNOWN ORIGIN BEGAN AROUND 30/0400Z. MAJOR STORM
LEVELS WERE OBSERVED IN THE HIGH LATITUDES FROM APPROXIMATELY
30/0800 - 1200Z. THE MID LATITUDES OBSERVED MINOR STORM CONDITIONS
DURING THE SAME PERIOD. THE GEOMAGNETIC FIELD RETURN TO UNSETTLED
CONDITIONS AT THE END OF THE PERIOD.
IIB. Geophysical Activity Forecast
THE GEOMAGNETIC FIELD IS
EXPECTED TO RANGE FROM QUIET TO ACTIVE DURING THE FIRST DAY,
BECOMING MORE QUIET TO UNSETTLED THE REST OF THE PERIOD.
III. Event Probabilities 01 OCT to 03 OCT
| Class M | 60% | 50% | 50% |
| Class X | 10% | 10% | 10% |
| Proton | 05% | 05% | 05% |
| PCAF | GREEN | ||
IV. Penticton 10.7 cm Flux
Observed 30 SEP 194 Predicted 01 OCT-03 OCT 185/180/175 90 Day Mean 30 SEP 182
V. Geomagnetic A Indices
OBSERVED AFR/AP 29 SEP 005/007 ESTIMATED AFR/AP 30 SEP 025/032 PREDICTED AFR/AP 01 OCT-03 OCT 012/015-010/012-010/015
VI. Geomagnetic Activity Probabilities 01 OCT to 03 OCT
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 30% | 20% | 20% |
| Minor storm | 10% | 05% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 35% | 25% | 25% |
| Minor storm | 15% | 10% | 10% |
| Major-severe storm | 05% | 01% | 01% |
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