Viewing archive of Tuesday, 25 November 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 Nov 25 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 329 Issued at 2200Z on 25 NOV 1997IA. Analysis of Solar Active Regions and Activity from 24-2100Z to 25-2100Z SOLAR ACTIVITY WAS LOW. SEVERAL C-CLASS FLARES OCCURRED
SINCE YESTERDAY, MOST OF WHICH WERE OPTICALLY UNCORRELATED. THE
LARGEST FLARE OF THE PAST DAY WAS A C9 AT 25/1952Z. THIS FLARE WAS
ASSOCIATED WITH A 140 SFU RADIO BURST AT 2695 MHZ AND A BSL (BRIGHT
SURGE AT THE LIMB) NEAR N25E90. THIS AREA IS ALSO PRESUMED TO BE THE
SOURCE OF THE UNCORRELATED X-RAY FLARES. NO SPOTS ARE YET VISIBLE
BUT SOMETHING SHOULD COME INTO VIEW BY TOMORROW. REGION 8108
(N19W79) HAS DECAYED FURTHER AND IS APPROACHING THE WEST LIMB
QUIETLY.
IB. Solar Activity Forecast
SOLAR ACTIVITY IS EXPECTED TO BE LOW
TO MODERATE. C-CLASS ACTIVITY IS EXPECTED TO CONTINUE FROM THE
SUNSPOT GROUP ROUNDING THE NORTHEAST LIMB NEAR NE25. AN ISOLATED
M-CLASS FLARE IS POSSIBLE FROM THIS AREA AS WELL.
IIA. Geophysical Activity Summary 24-2100Z to 25-2100Z
THE GEOMAGNETIC FIELD WAS QUIET AT ALL LATITUDES.
IIB. Geophysical Activity Forecast
THE GEOMAGNETIC FIELD IS
EXPECTED TO BE QUIET.
III. Event Probabilities 26 NOV to 28 NOV
| Class M | 30% | 30% | 30% |
| Class X | 02% | 02% | 02% |
| Proton | 01% | 01% | 01% |
| PCAF | GREEN | ||
IV. Penticton 10.7 cm Flux
Observed 25 NOV 102 Predicted 26 NOV-28 NOV 100/102/105 90 Day Mean 25 NOV 093
V. Geomagnetic A Indices
OBSERVED AFR/AP 24 NOV 006/007 ESTIMATED AFR/AP 25 NOV 003/005 PREDICTED AFR/AP 26 NOV-28 NOV 005/005-005/005-005/005
VI. Geomagnetic Activity Probabilities 26 NOV to 28 NOV
| 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% |
All times in UTC
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