Viewing archive of Saturday, 28 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 28 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 087 Issued at 2200Z on 28 MAR 1998IA. Analysis of Solar Active Regions and Activity from 27-2100Z to 28-2100Z SOLAR ACTIVITY WAS MODERATE. A M1/3N LONG DURATION
EVENT OCCURRED AT 27/2227Z FROM REGION 8185 (S26W15). A HALO/CME WAS
ALSO OBSERVED WHICH COINCIDES WITH THIS EVENT. A C4/SF EVENT AT
28/0717Z OCCURRED FROM REGION 8183 (N22W73).
IB. Solar Activity Forecast
SOLAR ACTIVITY SHOULD BE LOW TO
MODERATE THROUGH THE FORECAST PERIOD. REGION 8185 STILL HAS A GOOD
CHANCE OF PRODUCING ISOLATED M-CLASS EVENTS.
IIA. Geophysical Activity Summary 27-2100Z to 28-2100Z
THE GEOMAGNETIC FIELD WAS QUIET TO ACTIVE DURING THE PERIOD.
IIB. Geophysical Activity Forecast
THE GEOMAGNETIC FIELD IS
EXPECTED TO BE QUIET TO UNSETTLED THE FIRST TWO DAYS OF THE FORECAST
PERIOD. UNSETTLED TO ACTIVE CONDITIONS ARE EXPECTED ON THE THIRD DAY
AS A RESULT OF THE M2/3N HALO/CME ON 27/2227Z.
III. Event Probabilities 29 MAR to 31 MAR
| Class M | 30% | 30% | 30% |
| Class X | 05% | 05% | 05% |
| Proton | 01% | 01% | 01% |
| PCAF | GREEN | ||
IV. Penticton 10.7 cm Flux
Observed 28 MAR 104 Predicted 29 MAR-31 MAR 102/100/098 90 Day Mean 28 MAR 099
V. Geomagnetic A Indices
OBSERVED AFR/AP 27 MAR 009/013 ESTIMATED AFR/AP 28 MAR 010/010 PREDICTED AFR/AP 29 MAR-31 MAR 010/015-010/012-015/010
VI. Geomagnetic Activity Probabilities 29 MAR to 31 MAR
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 20% | 20% | 25% |
| Minor storm | 10% | 10% | 15% |
| Major-severe storm | 05% | 05% | 05% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 25% | 25% | 35% |
| Minor storm | 15% | 15% | 20% |
| Major-severe storm | 05% | 05% | 10% |
All times in UTC
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