Viewing archive of Wednesday, 24 December 1997
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 1997 Dec 24 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 358 Issued at 2200Z on 24 DEC 1997IA. Analysis of Solar Active Regions and Activity from 23-2100Z to 24-2100Z SOLAR ACTIVITY WAS VERY LOW. REGION 8124 (S22E27)
MANAGED ONLY TO PRODUCE A B4 SUBFLARE OVER THE PAST 24 HOURS. THIS
REGION HAS DECAYED BUT REMAINS MAGNETICALLY COMPLEX WITH A
BETA-GAMMA-DELTA CONFIGURATION. REGIONS 8123 (N18W77) AND 8125
(N19E28) HAVE REMAINED STABLE AND MAGNETICALLY SIMPLE. REGION 8126
(N21E66) HAS GROWN BUT REMAINS A SIMPLE HHX SPOT WITH NO OBSERVED
TRAILER SPOTS. THIS REGION PRODUCED A B8 SUBFLARE LATE IN THE PERIOD
AND HAS SEEMINGLY REVEALED SOME MAGNETIC COMPLEXITY.
IB. Solar Activity Forecast
SOLAR ACTIVITY IS EXPECTED TO INCREASE
TO LOW TO MODERATE AS REGION 8124 SLOWLY DECAYS AND 8126 GROWS. BOTH
REGIONS HAVE A GOOD CHANCE OF C-CLASS FLARING AND A SMALL CHANCE OF
PRODUCTING ISOLATED M-CLASS ACTIVITY.
IIA. Geophysical Activity Summary 23-2100Z to 24-2100Z
THE GEOMAGNETIC FIELD HAS BEEN QUIET AT ALL LATITUDES.
IIB. Geophysical Activity Forecast
THE GEOMAGNETIC FIELD IS
EXPECTED TO REMAIN MOSTLY QUIET FOR THE ENTIRE FORECAST PERIOD.
III. Event Probabilities 25 DEC to 27 DEC
| Class M | 25% | 25% | 25% |
| Class X | 05% | 05% | 05% |
| Proton | 01% | 01% | 01% |
| PCAF | GREEN | ||
IV. Penticton 10.7 cm Flux
Observed 24 DEC 108 Predicted 25 DEC-27 DEC 108/108/108 90 Day Mean 24 DEC 094
V. Geomagnetic A Indices
OBSERVED AFR/AP 23 DEC 003/003 ESTIMATED AFR/AP 24 DEC 006/005 PREDICTED AFR/AP 25 DEC-27 DEC 005/005-005/005-005/005
VI. Geomagnetic Activity Probabilities 25 DEC to 27 DEC
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 10% | 10% | 10% |
| Minor storm | 05% | 05% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 10% | 10% | 10% |
| Minor storm | 05% | 05% | 05% |
| Major-severe storm | 01% | 01% | 01% |
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