Viewing archive of Sunday, 12 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 12 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 193 Issued at 2200Z on 12 JUL 1998IA. Analysis of Solar Active Regions and Activity from 11-2100Z to 12-2100Z SOLAR ACTIVITY BECAME VERY LOW. ONLY SMALL B-CLASS
FLUCTUATIONS WERE OBSERVED. CURRENT DISK REGIONS WERE PREDOMINANTLY
STABLE.
IB. Solar Activity Forecast
SOLAR ACTIVITY SHOULD BE VERY LOW TO
LOW. SMALL C-CLASS EVENTS ARE POSSIBLE FROM REGIONS 8269 (N18E45)
AND 8270 (S20E42).
IIA. Geophysical Activity Summary 11-2100Z to 12-2100Z
THE GEOMAGNETIC FIELD AT MID-LATITUDES WAS QUIET TO UNSETTLED.
PLANETARY INDICES WERE QUIET TO ACTIVE. THE MOST DISTURBED
PERIOD WAS FROM 12/0600-1200Z.
IIB. Geophysical Activity Forecast
THE GEOMAGNETIC FIELD SHOULD BE
PREDOMINANTLY QUIET FOR THE NEXT THREE DAYS.
III. Event Probabilities 13 JUL to 15 JUL
| Class M | 05% | 05% | 05% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | GREEN | ||
IV. Penticton 10.7 cm Flux
Observed 12 JUL 099 Predicted 13 JUL-15 JUL 097/096/095 90 Day Mean 12 JUL 109
V. Geomagnetic A Indices
OBSERVED AFR/AP 11 JUL 011/011 ESTIMATED AFR/AP 12 JUL 008/012 PREDICTED AFR/AP 13 JUL-15 JUL 005/008-005/008-005/008
VI. Geomagnetic Activity Probabilities 13 JUL to 15 JUL
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 10% | 10% | 10% |
| 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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