Viewing archive of Wednesday, 29 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 29 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 210 Issued at 2200Z on 29 JUL 1998IA. Analysis of Solar Active Regions and Activity from 28-2100Z to 29-2100Z SOLAR ACTIVITY WAS VERY LOW. ONLY A FEW X-RAY FLARES
OCCURRED DURING THE PAST DAY; THE LARGEST WAS A B7 AT 28/2137Z. NO
OPTICAL FLARES WERE REPORTED. REGIONS 8280 (S23W24) AND 8282
(N32W27) REMAIN THE LARGEST SUNSPOT GROUPS ON THE VISIBLE DISK.
NEITHER REGION HAS PRODUCED SIGNIFICANT ACTIVITY. NEW REGION 8287
(N17W55) WAS NUMBERED. ANOTHER NEW SUNSPOT GROUP, AS YET UNNUMBERED,
APPEARS TO BE ROUNDING THE EAST LIMB NEAR SE 29.
IB. Solar Activity Forecast
SOLAR ACTIVITY IS EXPECTED TO BE VERY
LOW TO LOW. REGIONS 8280 AND 8282 ARE THE MOST LIKELY SOURCE OF
FLARES.
IIA. Geophysical Activity Summary 28-2100Z to 29-2100Z
THE GEOMAGNETIC FIELD WAS QUIET TO UNSETTLED.
IIB. Geophysical Activity Forecast
THE GEOMAGNETIC FIELD IS
EXPECTED TO BE QUIET TO UNSETTLED.
III. Event Probabilities 30 JUL to 01 AUG
| Class M | 15% | 15% | 15% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | GREEN | ||
IV. Penticton 10.7 cm Flux
Observed 29 JUL 120 Predicted 30 JUL-01 AUG 120/120/118 90 Day Mean 29 JUL 110
V. Geomagnetic A Indices
OBSERVED AFR/AP 28 JUL 005/006 ESTIMATED AFR/AP 29 JUL 006/010 PREDICTED AFR/AP 30 JUL-01 AUG 010/015-010/015-010/012
VI. Geomagnetic Activity Probabilities 30 JUL to 01 AUG
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 05% | 05% | 05% |
| Major-severe storm | 01% | 05% | 05% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 05% | 05% | 05% |
| Major-severe storm | 01% | 05% | 05% |
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