Viewing archive of Thursday, 30 July 1998
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 1998 Jul 30 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 211 Issued at 2200Z on 30 JUL 1998IA. Analysis of Solar Active Regions and Activity from 29-2100Z to 30-2100Z SOLAR ACTIVITY WAS VERY LOW. ONLY A FEW B-CLASS X-RAY
FLARES OCCURRED, NONE OF WHICH HAD CORRESPONDING OPTICAL FLARE
REPORTS. REGIONS 8280 (S22W41) AND 8282 (N31W34) REMAIN THE MOST
COMPLEX SUNSPOT GROUPS ON THE VISIBLE DISK. BOTH REGIONS ARE
DECAYING SLOWLY. NEW REGION 8288 (S26E61) WAS NUMBERED.
IB. Solar Activity Forecast
SOLAR ACTIVITY IS EXPECTED TO BE VERY
LOW TO LOW. FLARES ARE POSSIBLE IN REGIONS 8280 AND 8282.
IIA. Geophysical Activity Summary 29-2100Z to 30-2100Z
THE GEOMAGNETIC FIELD WAS QUIET TO UNSETTLED.
IIB. Geophysical Activity Forecast
THE GEOMAGNETIC FIELD IS
EXPECTED TO BE QUIET TO UNSETTLED.
III. Event Probabilities 31 JUL to 02 AUG
| Class M | 15% | 15% | 15% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | GREEN | ||
IV. Penticton 10.7 cm Flux
Observed 30 JUL 115 Predicted 31 JUL-02 AUG 112/110/108 90 Day Mean 30 JUL 110
V. Geomagnetic A Indices
OBSERVED AFR/AP 29 JUL 008/006 ESTIMATED AFR/AP 30 JUL 006/010 PREDICTED AFR/AP 31 JUL-02 AUG 010/010-010/010-005/010
VI. Geomagnetic Activity Probabilities 31 JUL to 02 AUG
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 05% | 05% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 05% | 05% | 05% |
| Major-severe storm | 01% | 01% | 01% |
All times in UTC
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