Viewing archive of Tuesday, 30 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 30 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 089 Issued at 2200Z on 30 MAR 1999IA. Analysis of Solar Active Regions and Activity from 29-2100Z to 30-2100Z SOLAR ACTIVITY WAS LOW DUE TO A SINGLE C1/SF EVENT AT
29/2216UT FROM REGION 8502 (S27E45). ACTIVITY WAS VERY LOW FOR THE
REMAINDER OF THE DAY. ONE NEW SPOT GROUP WAS NUMBERED, REGION 8504
(S28E61).
IB. Solar Activity Forecast
SOLAR ACTIVITY IS EXPECTED TO BE VERY
LOW WITH A CHANCE OF ISOLATED C-CLASS EVENTS FROM REGION 8502.
IIA. Geophysical Activity Summary 29-2100Z to 30-2100Z
THE GEOMAGNETIC FIELD WAS UNSETTLED TO ACTIVE. THIS ELEVATED ACTIVITY
WAS PROBABLY DUE TO A HIGH SPEED CORONAL HOLE STREAM.
IIB. Geophysical Activity Forecast
THE GEOMAGNETIC FIELD IS
EXPECTED TO BE QUIET TO UNSETTLED. A HIGH SPEED STREAM COULD
CONTINUE TO ELEVATE ACTIVITY SLIGHTLY OVER THE NEXT THREE DAYS.
III. Event Probabilities 31 MAR to 02 APR
| Class M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | GREEN | ||
IV. Penticton 10.7 cm Flux
Observed 30 MAR 105 Predicted 31 MAR-02 APR 110/110/115 90 Day Mean 30 MAR 137
V. Geomagnetic A Indices
OBSERVED AFR/AP 29 MAR 021/024 ESTIMATED AFR/AP 30 MAR 015/015 PREDICTED AFR/AP 31 MAR-02 APR 015/012-015/014-015/014
VI. Geomagnetic Activity Probabilities 31 MAR to 02 APR
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 25% | 25% | 25% |
| Minor storm | 10% | 10% | 10% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 25% | 25% | 25% |
| Minor storm | 10% | 10% | 10% |
| Major-severe storm | 01% | 01% | 01% |
All times in UTC
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