Viewing archive of Friday, 5 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 05 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 064 Issued at 2200Z on 05 MAR 1999IA. Analysis of Solar Active Regions and Activity from 04-2100Z to 05-2100Z SOLAR ACTIVITY WAS LOW. THERE WERE SEVERAL MINOR
C-CLASS X-RAY EVENTS THAT WERE NOT CORRELATED OPTICALLY DURING THE
PERIOD. THE LARGEST EVENT WAS FROM REGION 8477 (S26E15) WHICH
PRODUCED A C3/1N EVENT AT 05/1916Z. THREE FILAMENTS DISAPPEARED
BETWEEN 04/2058Z-05/1153Z IN THE SOUTHEAST WITH THE LARGEST BEING 38
DEGREES, LAST SEEN CENTERED NEAR S63E69. REGION 8476 (N18W49) AND
REGION 8477 HAVE CONTINUED TO SHOW GROWTH DURING THE PERIOD.
IB. Solar Activity Forecast
SOLAR ACTIVITY SHOULD BE LOW FOR THE
NEXT THREE DAYS. REGIONS 8471, 8475, 8476 AND 8477 ARE CAPABLE OF
PRODUCING C-CLASS EVENTS WITH THE POSSIBILITY OF ISOLATED M-CLASS
EVENTS THROUGH THE PERIOD.
IIA. Geophysical Activity Summary 04-2100Z to 05-2100Z
THE GEOMAGNETIC FIELD RANGED FROM QUIET TO MINOR STORM LEVELS. THIS
ACTIVITY IS BASED UPON THE CONTINUATION OF AN ELONGATED CORONAL HOLE
IN THE SOUTHWEST QUADRANT OF THE SUN. THE GREATER THAN 2 MEV
ELECTRONS AT GEOSYNCHRONOUS ORBIT REACHED HIGH LEVELS AROUND
05/0900Z.
IIB. Geophysical Activity Forecast
THE GEOMAGNETIC FIELD IS
EXPECTED TO BE PREDOMINANTLY UNSETTLED WITH ISOLATED ACTIVE LEVELS
FOR THE NEXT TWO DAYS OF THE FORECAST DUE TO THE ELONGATED CORONAL
HOLE IN THE SOUTHWEST. THE THIRD DAY OF THE FORECAST IS EXPECTED TO
BE QUIET TO UNSETTLED.
III. Event Probabilities 06 MAR to 08 MAR
| Class M | 25% | 25% | 35% |
| Class X | 05% | 05% | 05% |
| Proton | 05% | 05% | 05% |
| PCAF | GREEN | ||
IV. Penticton 10.7 cm Flux
Observed 05 MAR 128 Predicted 06 MAR-08 MAR 130/132/138 90 Day Mean 05 MAR 143
V. Geomagnetic A Indices
OBSERVED AFR/AP 04 MAR 019/023 ESTIMATED AFR/AP 05 MAR 020/020 PREDICTED AFR/AP 06 MAR-08 MAR 015/015-010/010-005/010
VI. Geomagnetic Activity Probabilities 06 MAR to 08 MAR
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 30% | 20% | 20% |
| Minor storm | 15% | 10% | 10% |
| Major-severe storm | 05% | 05% | 05% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 30% | 20% | 20% |
| Minor storm | 15% | 10% | 10% |
| Major-severe storm | 05% | 05% | 05% |
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