Viewing archive of Friday, 17 July 2009
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 2009 Jul 17 2201 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 198 Issued at 2200Z on 17 Jul 2009IA. Analysis of Solar Active Regions and Activity from 16-2100Z to 17-2100Z Solar activity was very low for the past 24 hours. No
solar flares have occurred. The visible disk remains spotless.
IB. Solar Activity Forecast
Solar activity is expected to remain
very low for the next three days (18-20 July).
IIA. Geophysical Activity Summary 16-2100Z to 17-2100Z
The geomagnetic field was at quiet levels for the past 24 hours.
IIB. Geophysical Activity Forecast
The geomagnetic field is
expected to remain quiet for the next three days (18-20 July).
III. Event Probabilities 18 Jul to 20 Jul
| Class M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | Green | ||
IV. Penticton 10.7 cm Flux
Observed 17 Jul 066 Predicted 18 Jul-20 Jul 067/067/067 90 Day Mean 17 Jul 069
V. Geomagnetic A Indices
Observed Afr/Ap 16 Jul 002/004 Estimated Afr/Ap 17 Jul 001/002 Predicted Afr/Ap 18 Jul-20 Jul 005/005-005/005-005/005
VI. Geomagnetic Activity Probabilities 18 Jul to 20 Jul
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 05% | 05% | 05% |
| Minor storm | 01% | 01% | 01% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 05% | 05% | 05% |
| Minor storm | 01% | 01% | 01% |
| Major-severe storm | 01% | 01% | 01% |
All times in UTC
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