Viewing archive of Tuesday, 19 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 19 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 263 Issued at 2200Z on 19 SEP 2000IA. Analysis of Solar Active Regions and Activity from 18-2100Z to 19-2100Z SOLAR ACTIVITY WAS HIGH. REGION 9165 (N15W54) PRODUCED
AN M5/1N AT 19/0826 UTC. THIS FLARE WAS ASSOCIATED WITH A TYPE II
RADIO SWEEP AND A 360 SFU TENFLARE. REGION 9166 (S13E11) AND 9169
(N09E60) PRODUCED SEVERAL C-CLASS EVENTS. REGION 9169 IS EXHIBITING
A BETA-GAMMA-DELTA MAGNETIC CONFIGURATION AND IS THE LARGEST REGION
VISIBLE ON THE DISK WITH 2140 MILLIONTHS OF WHITE LIGHT AREA.
IB. Solar Activity Forecast
SOLAR ACTIVITY IS EXPECTED TO BE LOW
TO MODERATE. M-CLASS FLARES ARE POSSIBLE FROM REGIONS 9165, 9166,
AND 9169.
IIA. GEOPHYSICAL ACTIVITY SUMMARY 18/2100Z TO 19/2100Z:
THE GEOMAGNETIC FIELD RANGED FROM QUIET TO MINOR STORM LEVELS.
ISOLATED MAJOR STORM LEVELS WERE OBSERVED AT HIGH LATITUDES FOR THE
PERIOD OF 19/1800 UTC.
IIB. Geophysical Activity Forecast
THE GEOMAGNETIC FIELD IS
EXPECTED TO BE UNSETTLED TO ACTIVE FOR THE FIRST DAY OF THE FORECAST
PERIOD. PREDOMINATELY UNSETTLED CONDITIONS ARE EXPECTED FOR DAYS
TWO AND THREE OF THE PERIOD.
III. Event Probabilities 20 SEP to 22 SEP
| Class M | 50% | 50% | 50% |
| Class X | 05% | 05% | 05% |
| Proton | 05% | 05% | 05% |
| PCAF | GREEN | ||
IV. Penticton 10.7 cm Flux
Observed 19 SEP 207 Predicted 20 SEP-22 SEP 210/215/215 90 Day Mean 19 SEP 177
V. Geomagnetic A Indices
OBSERVED AFR/AP 18 SEP 028/045 ESTIMATED AFR/AP 19 SEP 025/028 PREDICTED AFR/AP 20 SEP-22 SEP 020/020-015/015-010/010
VI. Geomagnetic Activity Probabilities 20 SEP to 22 SEP
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 60% | 30% | 20% |
| Minor storm | 15% | 15% | 10% |
| Major-severe storm | 05% | 05% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 75% | 30% | 25% |
| Minor storm | 15% | 15% | 10% |
| Major-severe storm | 05% | 05% | 01% |
All times in UTC
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