Viewing archive of Monday, 29 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 29 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 088 Issued at 2200Z on 29 MAR 1999IA. Analysis of Solar Active Regions and Activity from 28-2100Z to 29-2100Z SOLAR ACTIVITY WAS VERY LOW. REGION 8502 (S23W17) WAS
THE MOST ACTIVE REGION PRODUCING AN ISOLATED B3/SF AT 29/1705UT. A
NEW SPOT APPEARED ON THE LIMB JUST WEST OF REGION 8502. DUE TO THE
PROXIMITY OF THE LIMB THE OBSERVATORIES ARE UNABLE TO DETERMINE IF
THERE ARE TWO BACK-TO-BACK REGIONS OR A SINGLE LARGE SPOT GROUP AT
THIS TIME. ONE NEW SPOT GROUP WAS NUMBERED, REGION 8503 (S23W15).
IB. Solar Activity Forecast
SOLAR ACTIVITY IS EXPECTED TO BE VERY
LOW.
IIA. Geophysical Activity Summary 28-2100Z to 29-2100Z
THE GEOMAGNETIC FIELD WAS QUIET TO ACTIVE WITH A MINOR STORM PERIOD
OCCURRING AT 29/1500-1800UT. THIS WAS PROBABLY DUE TO A CORONAL HOLE
HIGH SPEED STREAM.
IIB. Geophysical Activity Forecast
THE GEOMAGNETIC FIELD IS
EXPECTED TO BE QUIET TO UNSETTLED. A HIGH SPEED STREAM COULD
CONTINUE TO ELEVATE ACTIVITY MARCH 30-31.
III. Event Probabilities 30 MAR to 01 APR
| Class M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | GREEN | ||
IV. Penticton 10.7 cm Flux
Observed 29 MAR 104 Predicted 30 MAR-01 APR 110/110/115 90 Day Mean 29 MAR 138
V. Geomagnetic A Indices
OBSERVED AFR/AP 28 MAR 007/006 ESTIMATED AFR/AP 29 MAR 015/018 PREDICTED AFR/AP 30 MAR-01 APR 015/015-015/010-010/010
VI. Geomagnetic Activity Probabilities 30 MAR to 01 APR
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 25% | 25% | 15% |
| Minor storm | 10% | 10% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 25% | 25% | 15% |
| Minor storm | 10% | 10% | 05% |
| Major-severe storm | 05% | 05% | 01% |
All times in UTC
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