Viewing archive of Thursday, 26 March 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 Mar 26 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 085 Issued at 2200Z on 26 MAR 1998IA. Analysis of Solar Active Regions and Activity from 25-2100Z to 26-2100Z SOLAR ACTIVITY WAS MODERATE. REGION 8185 (S25E12)
PRODUCED A LONG DURATION M1/2B AT 26/1259Z. REGION 8185 IS THE
LARGEST REGION ON THE DISK AND IS CURRENTLY A FHC GROUP.
IB. Solar Activity Forecast
SOLAR ACTIVITY SHOULD BE LOW TO
MODERATE. REGION 8185 REMAINS CAPABLE OF PRODUCING ISOLATED M-CLASS
EVENTS.
IIA. Geophysical Activity Summary 25-2100Z to 26-2100Z
THE GEOMAGNETIC FIELD WAS QUIET TO UNSETTLED FROM 25/2100Z TO
26/1200Z. UNSETTLED TO ACTIVE CONDITIONS WERE OBSERVED THE REMAINDER
OF THE PERIOD.
IIB. Geophysical Activity Forecast
THE GEOMAGNETIC FIELD SHOULD BE
QUIET TO UNSETTLED THROUGH THE FORECAST PERIOD.
III. Event Probabilities 27 MAR to 29 MAR
| Class M | 20% | 20% | 20% |
| Class X | 05% | 05% | 05% |
| Proton | 01% | 01% | 01% |
| PCAF | GREEN | ||
IV. Penticton 10.7 cm Flux
Observed 26 MAR 110 Predicted 27 MAR-29 MAR 111/111/110 90 Day Mean 26 MAR 099
V. Geomagnetic A Indices
OBSERVED AFR/AP 25 MAR 009/016 ESTIMATED AFR/AP 26 MAR 010/012 PREDICTED AFR/AP 27 MAR-29 MAR 010/012-010/010-010/010
VI. Geomagnetic Activity Probabilities 27 MAR to 29 MAR
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 20% | 20% | 20% |
| Minor storm | 10% | 10% | 10% |
| Major-severe storm | 05% | 05% | 05% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 25% | 25% | 25% |
| Minor storm | 15% | 15% | 15% |
| Major-severe storm | 05% | 05% | 05% |
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