Viewing archive of Thursday, 7 August 2003
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 2003 Aug 07 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 219 Issued at 2200Z on 07 Aug 2003IA. Analysis of Solar Active Regions and Activity from 06-2100Z to 07-2100Z Solar activity has been low. Region 421 (S07W72)
produced several flares, including a C1.3 at 07/1203 UTC. Two
C-class flares were produced from an active region just on the other
side of the east limb, the largest a C2.1 at 07/2050 UTC. These
events were optically correlated with SXI imagery. Region 424 has
stabilized in size and magnetic complexity. New Region 430 (S08W13)
was numbered today.
IB. Solar Activity Forecast
Solar activity is expected to be at
low to moderate levels. C-class flares are possible from Region
421. In the next few days, active regions just beyond the east limb
should begin to appear earthside, which may produce increased solar
activity.
IIA. Geophysical Activity Summary 06-2100Z to 07-2100Z
The geomagnetic field has been at quiet to active levels. High
solar wind speeds (up to 700 km/s), associated with a coronal hole in
geoeffective position, are the likely cause of active conditions late
in the period.
IIB. Geophysical Activity Forecast
The geomagnetic field is
expected to be at quiet to active levels, with isolated minor storm
conditions possible, for day one, due to continued influence of an
equatorial coronal hole. On days two and three, as the coronal hole
rotates out of geoeffective position, activity should decrease to
quiet to unsettled conditions.
III. Event Probabilities 08 Aug to 10 Aug
| Class M | 40% | 45% | 45% |
| Class X | 05% | 10% | 10% |
| Proton | 01% | 01% | 01% |
| PCAF | Green | ||
IV. Penticton 10.7 cm Flux
Observed 07 Aug 137 Predicted 08 Aug-10 Aug 130/130/130 90 Day Mean 07 Aug 124
V. Geomagnetic A Indices
Observed Afr/Ap 06 Aug 034/043 Estimated Afr/Ap 07 Aug 010/015 Predicted Afr/Ap 08 Aug-10 Aug 025/040-012/025-015/015
VI. Geomagnetic Activity Probabilities 08 Aug to 10 Aug
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 30% | 30% | 30% |
| Minor storm | 25% | 20% | 15% |
| Major-severe storm | 05% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 30% | 30% | 30% |
| Minor storm | 35% | 30% | 25% |
| Major-severe storm | 10% | 05% | 05% |
All times in UTC
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