Viewing archive of Tuesday, 6 July 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 Jul 06 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 187 Issued at 2200Z on 06 JUL 1999IA. Analysis of Solar Active Regions and Activity from 05-2100Z to 06-2100Z SOLAR ACTIVITY WAS LOW. ONLY A FEW LOW C-CLASS FLARES
OCCURRED DURING THE PERIOD. FOUR NEW REGIONS WERE NUMBERED TODAY AS
REGION 8622 (S31W20), REGION 8623 (N26W11), REGION 8624 (N25E26) AND
REGION 8625 (S20E76).
IB. Solar Activity Forecast
SOLAR ACTIVITY IS EXPECTED TO BE LOW
TO MODERATE WITH ISOLATED M-CLASS FLARES POSSIBLE.
IIA. Geophysical Activity Summary 05-2100Z to 06-2100Z
THE GEOMAGNETIC FIELD WAS QUIET TO UNSETTLED. A SUDDEN IMPULSE OF 5
NT WAS OBSERVED AT 06/1508Z. THE LIKELY SOURCE OF THIS DISTURBANCE
WAS A CORONAL MASS EJECTION/PARTIAL HALO OFF THE WEST LIMB LATE ON 3
JULY.
IIB. Geophysical Activity Forecast
THE GEOMAGNETIC FIELD IS
EXPECTED TO BE QUIET TO UNSETTLED. ISOLATED PERIODS OF ACTIVE
CONDITIONS ARE POSSIBLE IN THE NIGHTTIME SECTORS FOR DAY ONE OF THE
FORECAST.
III. Event Probabilities 07 JUL to 09 JUL
| Class M | 60% | 60% | 60% |
| Class X | 10% | 10% | 10% |
| Proton | 05% | 05% | 05% |
| PCAF | GREEN | ||
IV. Penticton 10.7 cm Flux
Observed 06 JUL 168 Predicted 07 JUL-09 JUL 160/160/155 90 Day Mean 06 JUL 150
V. Geomagnetic A Indices
OBSERVED AFR/AP 05 JUL 003/004 ESTIMATED AFR/AP 06 JUL 010/008 PREDICTED AFR/AP 07 JUL-09 JUL 008/008-005/008-005/007
VI. Geomagnetic Activity Probabilities 07 JUL to 09 JUL
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 20% | 15% | 15% |
| Minor storm | 10% | 05% | 05% |
| Major-severe storm | 05% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 25% | 20% | 20% |
| Minor storm | 15% | 10% | 10% |
| Major-severe storm | 05% | 05% | 05% |
All times in UTC
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