Viewing archive of Thursday, 2 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 02 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 092 Issued at 2200Z on 02 APR 1998IA. Analysis of Solar Active Regions and Activity from 01-2100Z to 02-2100Z SOLAR ACTIVITY WAS LOW. TODAY'S ACTIVITY CONSISTED OF
OCCASIONAL C-CLASS FLARES; THE LARGEST WAS A C2/SF FROM REGION 8190
(S19E10). THIS GROUP IS NO LONGER GROWING RAPIDLY, BUT THERE DOES
APPEAR TO BE A SMALL DELTA CONFIGURATION NEAR THE CENTER OF THE
REGION ASSOCIATED WITH RELATIVELY BRIGHT LOOPS IN THE CORONA. NEW
REGION NUMBER 8192 (S30W55) WAS ASSIGNED AND IS A SIMPLE A-TYPE
GROUP.
IB. Solar Activity Forecast
SOLAR ACTIVITY IS EXPECTED TO BE LOW.
THERE CONTINUES, HOWEVER, TO BE A SLIGHT CHANCE FOR AN ISOLATED
M-CLASS EVENT.
IIA. Geophysical Activity Summary 01-2100Z to 02-2100Z
THE GEOMAGNETIC FIELD WAS QUIET AT ALL LATITUDES FOR THE PAST 24
HOURS. THE GREATER THAN 2 MEV ELECTRON FLUX WAS AT HIGH LEVELS.
IIB. Geophysical Activity Forecast
THE GEOMAGNETIC FIELD IS
EXPECTED TO BE QUIET TO UNSETTLED FOR THE NEXT THREE DAYS.
III. Event Probabilities 03 APR to 05 APR
| Class M | 20% | 20% | 15% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | GREEN | ||
IV. Penticton 10.7 cm Flux
Observed 02 APR 103 Predicted 03 APR-05 APR 100/098/105 90 Day Mean 02 APR 099
V. Geomagnetic A Indices
OBSERVED AFR/AP 01 APR 002/005 ESTIMATED AFR/AP 02 APR 002/005 PREDICTED AFR/AP 03 APR-05 APR 005/008-005/008-005/008
VI. Geomagnetic Activity Probabilities 03 APR to 05 APR
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 05% | 10% | 10% |
| Minor storm | 05% | 05% | 05% |
| Major-severe storm | 01% | 05% | 05% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 05% | 10% | 10% |
| Minor storm | 05% | 05% | 05% |
| Major-severe storm | 01% | 05% | 05% |
All times in UTC
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