Viewing archive of Saturday, 18 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 18 2201 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 199 Issued at 2200Z on 18 Jul 2009IA. Analysis of Solar Active Regions and Activity from 17-2100Z to 18-2100Z Solar activity was very low. No flares occurred as the
disk remains spotless.
IB. Solar Activity Forecast
Solar activity will continue very low.
IIA. Geophysical Activity Summary 17-2100Z to 18-2100Z
The geomagnetic field was quiet.
IIB. Geophysical Activity Forecast
The geomagnetic field will be
quiet early in the interval, then become increasingly disturbed when
a recurrent high-speed stream returns. Unsettled to active
conditions are anticipated by July 21.
III. Event Probabilities 19 Jul to 21 Jul
| Class M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | Green | ||
IV. Penticton 10.7 cm Flux
Observed 18 Jul 067 Predicted 19 Jul-21 Jul 067/067/067 90 Day Mean 18 Jul 069
V. Geomagnetic A Indices
Observed Afr/Ap 17 Jul 000/002 Estimated Afr/Ap 18 Jul 000/005 Predicted Afr/Ap 19 Jul-21 Jul 005/005-005/008-015/018
VI. Geomagnetic Activity Probabilities 19 Jul to 21 Jul
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 05% | 05% | 25% |
| Minor storm | 01% | 01% | 01% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 05% | 05% | 35% |
| Minor storm | 01% | 01% | 05% |
| Major-severe storm | 01% | 01% | 01% |
All times in UTC
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