Viewing archive of Monday, 6 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 06 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 096 Issued at 2200Z on 06 APR 1998IA. Analysis of Solar Active Regions and Activity from 05-2100Z to 06-2100Z SOLAR ACTIVITY CONTINUED AT MODERATE LEVELS. REGION
8195 (S26E75) PRODUCED AN M1/2F FLARE AT 06/1648UT. REGION 8194
(S18E60) PRODUCED A COUPLE SUBFLARES DURING THE PERIOD. LIMB
PROXIMITY PREVENTED A DETAILED ANALYSIS OF THESE TWO REGIONS. BOTH
REGIONS APPEAR TO SHARE A COMMON NEUTRAL LINE. A WEAK TYPE II SWEEP
OCCURRED AT 06/0455UT, BUT HAD NO OPTICAL CORRELATION. REGION 8193
(S22E14) CONTINUED TO DISPLAY GRADUAL GROWTH IN AREA AND SPOT COUNT,
BUT PRODUCED NO FLARES. NO NEW REGIONS WERE NUMBERED.
IB. Solar Activity Forecast
SOLAR ACTIVITY IS EXPECTED TO REMAIN
AT MODERATE LEVELS. M-CLASS FLARES ARE POSSIBLE FROM THE 8194/8195
REGION COMPLEX. THERE IS A SLIGHT CHANCE FOR A MAJOR FLARE FROM THIS
AREA AS WELL.
IIA. Geophysical Activity Summary 05-2100Z to 06-2100Z
THE GEOMAGNETIC FIELD HAS BEEN QUIET.
IIB. Geophysical Activity Forecast
THE GEOMAGNETIC FIELD IS
EXPECTED TO BE AT QUIET TO UNSETTLED LEVELS.
III. Event Probabilities 07 APR to 09 APR
| Class M | 60% | 60% | 60% |
| Class X | 10% | 10% | 10% |
| Proton | 01% | 01% | 01% |
| PCAF | GREEN | ||
IV. Penticton 10.7 cm Flux
Observed 06 APR 133 Predicted 07 APR-09 APR 136/138/140 90 Day Mean 06 APR 100
V. Geomagnetic A Indices
OBSERVED AFR/AP 05 APR 003/004 ESTIMATED AFR/AP 06 APR 006/006 PREDICTED AFR/AP 07 APR-09 APR 008/008-008/008-008/008
VI. Geomagnetic Activity Probabilities 07 APR to 09 APR
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 10% | 10% | 10% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 20% | 20% | 20% |
| Minor storm | 15% | 15% | 15% |
| Major-severe storm | 01% | 01% | 01% |
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