Joint USAF/NOAA Report of Solar and Geophysical Activity 21 Aug 2008
Product: Report of Solar-Geophysical Activity
Issued: 2008 Aug 21 2200 UTC
Prepared jointly by the U.S. Dept. of Commerce, NOAA,
Space Weather Prediction Center and the U.S. Air Force.
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 234 Issued at 2200Z on 21 Aug 2008
IA. Analysis of Solar Active Regions and Activity from 20/2100Z to 21/2100Z: Solar activity was very low.
IB. Solar Activity Forecast: Solar activity is expected to be very low.
IIA. Geophysical Activity Summary 20/2100Z to 21/2100Z: The geomagnetic field was mostly quiet. 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 quiet for the next two days (22-23 August) and quiet to unsettled on day three (24 August).
III. Event Probabilities 22 Aug-24 Aug
- Class M 01/01/01
- Class X 01/01/01
- Proton 01/01/01
- PCAF Green
IV. Penticton 10.7 cm Flux
- Observed 21 Aug 067
- Predicted 22 Aug-24 Aug 066/066/066
- 90 Day Mean 21 Aug 066
V. Geomagnetic A Indices
- Observed Afr/Ap 20 Aug 005/006
- Estimated Afr/Ap 21 Aug 005/005
- Predicted Afr/Ap 22 Aug-24 Aug 005/005-005/005-007/008
VI. Geomagnetic Activity Probabilities 22 Aug-24 Aug
A. Middle Latitudes
- Active 05/05/10
- Minor storm 01/01/01
- Major-severe storm 01/01/01
B. High Latitudes
- Active 05/05/20
- Minor storm 01/01/05
- Major-severe storm 01/01/01