Viewing archive of Monday, 11 January 1999
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 1999 Jan 11 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 011 Issued at 2200Z on 11 JAN 1999IA. Analysis of Solar Active Regions and Activity from 10-2100Z to 11-2100Z SOLAR ACTIVITY WAS LOW DUE TO TWO OPTICALLY
UNCORRELATED C-CLASS X-RAY BURSTS, A C1 AT 11/1735UT AND A C2 AT
11/1959UT. THE ACTIVE REGIONS ON THE VISIBLE SOLAR DISK HAVE EITHER
DECAYED OR REMAINED UNCHANGED. ALL ARE SMALL AND RELATIVELY SIMPLE.
IB. Solar Activity Forecast
SOLAR ACTIVITY IS EXPECTED TO BE LOW.
IIA. Geophysical Activity Summary 10-2100Z to 11-2100Z
THE GEOMAGNETIC FIELD WAS QUIET. THE GREATER THAN 2 MEV ELECTRON FLUX
WAS MODERATE.
IIB. Geophysical Activity Forecast
THE GEOMAGNETIC FIELD IS
EXPECTED TO BE QUIET TO UNSETTLED.
III. Event Probabilities 12 JAN to 14 JAN
| Class M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | GREEN | ||
IV. Penticton 10.7 cm Flux
Observed 11 JAN 112 Predicted 12 JAN-14 JAN 112/115/120 90 Day Mean 11 JAN 138
V. Geomagnetic A Indices
OBSERVED AFR/AP 10 JAN 005/004 ESTIMATED AFR/AP 11 JAN 005/008 PREDICTED AFR/AP 12 JAN-14 JAN 005/009-005/009-005/009
VI. Geomagnetic Activity Probabilities 12 JAN to 14 JAN
| 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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