Viewing archive of Wednesday, 19 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 19 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 323 Issued at 2200Z on 19 NOV 1997IA. Analysis of Solar Active Regions and Activity from 18-2100Z to 19-2100Z SOLAR ACTIVITY WAS LOW. REGION 8108 (N19E03) PRODUCED A
LONG-DURATION C1 X-RAY EVENT, BEGINNING ABOUT 1700Z AND STILL IN
PROGRESS. THE EXTENDED MAXIMUM OF THE FLARE WAS CENTERED AT 1910Z.
MODEST RADIO BURSTS AT 245, 410 AND 606 MHZ ACCOMPANIED THE EVENT.
THE REGION IS STILL MAGNETICALLY COMPLEX, WITH A SLIGHT MIXTURE OF
POLARITIES EXISTING IN THE MAIN LEADER SPOT. LITTLE ELSE OF
SIGNIFICANCE ON THE VISIBLE DISK OCCURRED.
IB. Solar Activity Forecast
SOLAR ACTIVITY IS EXPECTED TO BE LOW.
HOWEVER, THERE IS A SIGNIFICANT CHANCE OF AN M-CLASS FLARE FROM
REGION 8108 IF FURTHER DEVELOPMENT OCCURS.
IIA. Geophysical Activity Summary 18-2100Z to 19-2100Z
THE GEOMAGNETIC FIELD WAS QUIET.
IIB. Geophysical Activity Forecast
THE GEOMAGNETIC FIELD IS
EXPECTED TO BE UNSETTLED TO ACTIVE. A HIGH SPEED STREAM IS LIKELY TO
MAINTAIN ACTIVITY AT THIS LEVEL THROUGHOUT THE PERIOD.
III. Event Probabilities 20 NOV to 22 NOV
| Class M | 25% | 25% | 25% |
| Class X | 05% | 05% | 05% |
| Proton | 05% | 05% | 05% |
| PCAF | GREEN | ||
IV. Penticton 10.7 cm Flux
Observed 19 NOV 099 Predicted 20 NOV-22 NOV 095/095/095 90 Day Mean 19 NOV 091
V. Geomagnetic A Indices
OBSERVED AFR/AP 18 NOV 011/009 ESTIMATED AFR/AP 19 NOV 003/010 PREDICTED AFR/AP 20 NOV-22 NOV 015/015-015/018-015/015
VI. Geomagnetic Activity Probabilities 20 NOV to 22 NOV
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 30% | 30% | 30% |
| Minor storm | 10% | 10% | 10% |
| Major-severe storm | 05% | 05% | 05% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 40% | 40% | 40% |
| Minor storm | 15% | 15% | 15% |
| Major-severe storm | 05% | 05% | 05% |
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