Viewing archive of Saturday, 24 January 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 Jan 24 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 024 Issued at 2200Z on 24 JAN 1998IA. Analysis of Solar Active Regions and Activity from 23-2100Z to 24-2100Z SOLAR ACTIVITY REMAINED VERY LOW. NO OPTICAL FLARES
WERE REPORTED. MINOR GROWTH OCCURRED IN REGIONS 8142 (S21W20) AND
8143 (S34E47). NEW REGIONS 8145 (N30E59) AND 8146 (N15E62) WERE
NUMBERED. BOTH WERE SMALL AND STABLE.
IB. Solar Activity Forecast
SOLAR ACTIVITY IS EXPECTED TO BE VERY
LOW TO LOW. REGION 8143 APPEARS CAPABLE OF PRODUCING C-CLASS
SUBFLARES, ESPECIALLY IF CURRENT GROWTH CONTINUES.
IIA. Geophysical Activity Summary 23-2100Z to 24-2100Z
THE GEOMAGNETIC FIELD WAS QUIET AT ALL LATITUDES.
IIB. Geophysical Activity Forecast
A SMALL GEOMAGNETIC DISTURBANCE
IS EXPECTED TO OCCUR DURING 25 - 26 JANUARY IN RESPONSE TO A
PARTIAL-HALO CME OBSERVED EARLY 21 JANUARY. UNSETTLED TO ACTIVE
PERIODS ARE FORECAST TO OCCUR DURING THE DISTURBANCE. ISOLATED MINOR
STORM INTERVALS MAY OCCUR AS WELL. THE FIELD IS EXPECTED TO RETURN
TO MOSTLY QUIET LEVELS BY 27 JANUARY.
III. Event Probabilities 25 JAN to 27 JAN
| Class M | 05% | 05% | 05% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | GREEN | ||
IV. Penticton 10.7 cm Flux
Observed 24 JAN 098 Predicted 25 JAN-27 JAN 100/102/102 90 Day Mean 24 JAN 097
V. Geomagnetic A Indices
OBSERVED AFR/AP 23 JAN 003/003 ESTIMATED AFR/AP 24 JAN 004/005 PREDICTED AFR/AP 25 JAN-27 JAN 010/010-008/005-005/005
VI. Geomagnetic Activity Probabilities 25 JAN to 27 JAN
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 20% | 10% | 05% |
| Minor storm | 05% | 01% | 01% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 25% | 20% | 10% |
| Minor storm | 05% | 05% | 01% |
| Major-severe storm | 01% | 01% | 01% |
All times in UTC
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