Viewing archive of Wednesday, 7 August 2002
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 2002 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 2002IA. Analysis of Solar Active Regions and Activity from 06-2100Z to 07-2100Z Solar activity was moderate during the past 24 hours
due to an M1 flare at 0126 UTC from Region 57 (S09W79). This group
has continued to show surging and plage brightenings as it nears the
west limb. Region 61 (N09E28) showed steady growth during the past
24 hours and has formed a small delta configuration in the central
portion of the region. The group has only been able to produce
subflare level activity so far. Region 63 (N17E65) has rotated into
view as a moderate sized bipolar region and produced a couple
subflares during the past 24 hours.
IB. Solar Activity Forecast
Solar activity is expected to be
mostly low, but there is a fair chance for an isolated M-class event
sometime during the next three days. The most likely sources for
flare activity are Regions 57, 61, and 63.
IIA. Geophysical Activity Summary 06-2100Z to 07-2100Z
The geomagnetic field was quiet to unsettled during the past 24
hours. ACE real-time solar wind show a solar sector boundary change
at about 0800 UTC on 07 August.
IIB. Geophysical Activity Forecast
The geomagnetic field is
expected to be mostly unsettled with a slight chance for active
levels during the next 24 hours. Enhanced activity may occur in
response to a favorably positioned coronal hole. Conditions are
expected to be unsettled on day two and quiet to unsettled on the
third day.
III. Event Probabilities 08 Aug to 10 Aug
| Class M | 35% | 35% | 35% |
| Class X | 05% | 05% | 05% |
| Proton | 05% | 05% | 05% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 07 Aug 136 Predicted 08 Aug-10 Aug 135/135/135 90 Day Mean 07 Aug 165
V. Geomagnetic A Indices
Observed Afr/Ap 06 Aug 004/009 Estimated Afr/Ap 07 Aug 007/008 Predicted Afr/Ap 08 Aug-10 Aug 010/010-008/008-005/008
VI. Geomagnetic Activity Probabilities 08 Aug to 10 Aug
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 30% | 25% | 20% |
| Minor storm | 20% | 15% | 10% |
| Major-severe storm | 05% | 05% | 05% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 35% | 30% | 20% |
| Minor storm | 20% | 15% | 10% |
| Major-severe storm | 05% | 05% | 05% |
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