Viewing archive of Thursday, 3 July 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 Jul 03 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 184 Issued at 2200Z on 03 Jul 2003IA. Analysis of Solar Active Regions and Activity from 02-2100Z to 03-2100Z Solar activity was low. Regions 397 (N12E00) and 400
(N05E44) produced a few C-class flares during the past 24 hours. The
largest of these was a C5 at 02/2222 UTC from Region 400. Region 400
was active all day and has a dominant northeast-to-southwest
inversion line. Region 397 showed growth in the trailer portion of
the group, leading to the formation of two small delta
configurations.
IB. Solar Activity Forecast
Solar activity is expected to be
moderate. There is a good chance for M-class flare activity from
Region 397. In addition, the magnetic structure of Region 400
suggests that it is likely to build shear and this should lead to
frequent subflare activity.
IIA. Geophysical Activity Summary 02-2100Z to 03-2100Z
The geomagnetic field ranged from quiet to active levels. Solar wind
speeds increased up to around 600 km/s at 02/2300 UTC, but dropped
down to 500-550 km/s from 0100-1900 UTC. However, there appears to
be another solar wind speed increase in progress at this time. The
greater than 2 MeV electron fluxes were at high levels during the
past 24 hours.
IIB. Geophysical Activity Forecast
The geomagnetic field is
expected to be mostly active for the next two days in response to a
favorably positioned coronal hole. There may also be isolated
periods of storm level activity. A gradual decline to unsettled to
active is expected on the third day.
III. Event Probabilities 04 Jul to 06 Jul
| Class M | 60% | 60% | 60% |
| Class X | 05% | 05% | 05% |
| Proton | 05% | 05% | 05% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 03 Jul 132 Predicted 04 Jul-06 Jul 135/138/141 90 Day Mean 03 Jul 123
V. Geomagnetic A Indices
Observed Afr/Ap 02 Jul 011/015 Estimated Afr/Ap 03 Jul 014/015 Predicted Afr/Ap 04 Jul-06 Jul 020/025-020/025-015/020
VI. Geomagnetic Activity Probabilities 04 Jul to 06 Jul
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 35% | 35% | 30% |
| Minor storm | 25% | 25% | 20% |
| Major-severe storm | 10% | 10% | 05% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 30% | 30% | 25% |
| Minor storm | 30% | 30% | 25% |
| Major-severe storm | 15% | 15% | 10% |
All times in UTC
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