Viewing archive of Saturday, 25 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 25 2201 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 206 Issued at 2200Z on 25 Jul 2009IA. Analysis of Solar Active Regions and Activity from 24-2100Z to 25-2100Z Solar activity has been very low. No flares were
observed during the past 24 hours. The solar disk is spotless.
IB. Solar Activity Forecast
Solar activity is expected to be very
low.
IIA. Geophysical Activity Summary 24-2100Z to 25-2100Z
The geomagnetic field was at quiet to unsettled levels. Solar wind
speeds observed from the ACE spacecraft have diminished during the
past 24 hours. Solar wind velocities now average around 460 km/s.
The greater than 2 MeV electron flux at geosynchronous orbit reached
high levels today.
IIB. Geophysical Activity Forecast
The geomagnetic field is
expected to be mostly quiet for the next three days (26-28 July).
III. Event Probabilities 26 Jul to 28 Jul
| Class M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | Green | ||
IV. Penticton 10.7 cm Flux
Observed 25 Jul 069 Predicted 26 Jul-28 Jul 070/070/070 90 Day Mean 25 Jul 069
V. Geomagnetic A Indices
Observed Afr/Ap 24 Jul 005/006 Estimated Afr/Ap 25 Jul 005/008 Predicted Afr/Ap 26 Jul-28 Jul 005/005-005/005-005/005
VI. Geomagnetic Activity Probabilities 26 Jul to 28 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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