Viewing archive of Tuesday, 14 April 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 Apr 14 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 104 Issued at 2200Z on 14 APR 1998IA. Analysis of Solar Active Regions and Activity from 13-2100Z to 14-2100Z SOLAR ACTIVITY WAS VERY LOW. NO FLARES OCCURRED. NEW
REGION 8203 (N30W12), A SIMPLE 2-SPOT 'AXX' GROUP, WAS NUMBERED
TODAY. THE REMAINDER OF THE VISIBLE DISK WAS QUIET AND UNREMARKABLE.
IB. Solar Activity Forecast
SOLAR ACTIVITY IS EXPECTED TO BE VERY
LOW.
IIA. Geophysical Activity Summary 13-2100Z to 14-2100Z
THE GEOMAGNETIC FIELD HAS BEEN QUIET TO UNSETTLED FOR THE PAST 24
HOURS. THE GREATER THAN 2 MEV ELECTRON FLUX REACHED HIGH LEVELS AT
14/1720Z, AND CONTINUED ABOVE THRESHOLD FOR THE REMAINDER OF HE
REPORTING PERIOD.
IIB. Geophysical Activity Forecast
THE GEOMAGNETIC FIELD IS
EXPECTED TO BE QUIET TO UNSETTLED FOR THE NEXT THREE DAYS.
III. Event Probabilities 15 APR to 17 APR
| Class M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | GREEN | ||
IV. Penticton 10.7 cm Flux
Observed 14 APR 112 Predicted 15 APR-17 APR 109/107/105 90 Day Mean 14 APR 104
V. Geomagnetic A Indices
OBSERVED AFR/AP 13 APR 004/005 ESTIMATED AFR/AP 14 APR 008/008 PREDICTED AFR/AP 15 APR-17 APR 005/008-010/008-010/012
VI. Geomagnetic Activity Probabilities 15 APR to 17 APR
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 05% | 05% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 05% | 05% | 05% |
| Major-severe storm | 01% | 01% | 01% |
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