Viewing archive of Friday, 26 March 1999
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 1999 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 1999IA. Analysis of Solar Active Regions and Activity from 25-2100Z to 26-2100Z SOLAR ACTIVITY REMAINED VERY LOW. THE THREE SPOTTED
REGIONS WERE QUIET AND STABLE. NEW SPOTS MAY BE EMERGING JUST WEST
OF REGION 8498 (N18E29). THE LIMBS WERE QUIET.
IB. Solar Activity Forecast
SOLAR ACTIVITY SHOULD CONTINUE VERY
LOW.
IIA. Geophysical Activity Summary 25-2100Z to 26-2100Z
THE GEOMAGNETIC FIELD WAS QUIET TO UNSETTLED.
IIB. Geophysical Activity Forecast
THE GEOMAGNETIC FIELD IS
EXPECTED TO PERSIST AT QUIET TO UNSETTLED CONDITIONS FOR THE NEXT
THREE DAYS.
III. Event Probabilities 27 MAR to 29 MAR
| Class M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | GREEN | ||
IV. Penticton 10.7 cm Flux
Observed 26 MAR 104 Predicted 27 MAR-29 MAR 105/105/110 90 Day Mean 26 MAR 140
V. Geomagnetic A Indices
OBSERVED AFR/AP 25 MAR 005/008 ESTIMATED AFR/AP 26 MAR 008/008 PREDICTED AFR/AP 27 MAR-29 MAR 010/012-010/012-010/015
VI. Geomagnetic Activity Probabilities 27 MAR to 29 MAR
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 20% | 20% | 20% |
| Minor storm | 05% | 05% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 25% | 25% | 25% |
| Minor storm | 05% | 05% | 05% |
| Major-severe storm | 01% | 01% | 01% |
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