Viewing archive of Wednesday, 5 August 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 Aug 05 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 217 Issued at 2200Z on 05 AUG 1998IA. Analysis of Solar Active Regions and Activity from 04-2100Z to 05-2100Z SOLAR ACTIVITY WAS LOW. A SINGLE UNOBSERVED C-CLASS
EVENT OCCURRED AT 1615Z. REGION 8293 (S22E39) GREW IN WHITE LIGHT
AND H-ALPHA, AND IS THE DOMINANT REGION ON THE DISK. IT POSSESSES A
SLIGHT DEGREE OF MAGNETIC COMPLEXITY AND BRIGHT PLAGE. NEWLY
NUMBERED REGION 8296 (N16E70) ROTATED FULLY INTO VIEW AS A MATURE
SINGLE SPOT. THE LIMBS WERE QUIET.
IB. Solar Activity Forecast
SOLAR ACTIVITY IS EXPECTED TO REMAIN
LOW. REGION 8293 COULD RAISE ACTIVITY LEVELS OVER THE NEXT THREE
DAYS IF ADDITIONAL DEVELOPMENT OCCURS THERE.
IIA. Geophysical Activity Summary 04-2100Z to 05-2100Z
THE GEOMAGNETIC FIELD WAS QUIET TO UNSETTLED.
IIB. Geophysical Activity Forecast
THE GEOMAGNETIC FIELD IS
EXPECTED TO PERSIST AT QUIET TO UNSETTLED LEVELS THROUGHOUT THE
FORECAST PERIOD.
III. Event Probabilities 06 AUG to 08 AUG
| Class M | 10% | 10% | 10% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | GREEN | ||
IV. Penticton 10.7 cm Flux
Observed 05 AUG 127 Predicted 06 AUG-08 AUG 130/130/135 90 Day Mean 05 AUG 109
V. Geomagnetic A Indices
OBSERVED AFR/AP 04 AUG 008/009 ESTIMATED AFR/AP 05 AUG 010/010 PREDICTED AFR/AP 06 AUG-08 AUG 010/008-005/008-005/008
VI. Geomagnetic Activity Probabilities 06 AUG to 08 AUG
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 20% | 10% | 10% |
| Minor storm | 05% | 05% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 25% | 15% | 15% |
| Minor storm | 05% | 05% | 05% |
| Major-severe storm | 01% | 01% | 01% |
All times in UTC
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