Joint USAF/NOAA Report of Solar and Geophysical Activity 20 Aug 2007

Product: Report of Solar-Geophysical Activity
Issued: 2007 Aug 20 2200 UTC
Prepared jointly by the U.S. Dept. of Commerce, NOAA,
Space Environment Center and the U.S. Air Force.
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 232 Issued at 2200Z on 20 Aug 2007
IA. Analysis of Solar Active Regions and Activity from 19/2100Z to 20/2100Z: Solar activity has been very low.
IB. Solar Activity Forecast: Solar activity is expected to be very low to low.
IIA. Geophysical Activity Summary 19/2100Z to 20/2100Z: The geomagnetic field has been quiet.
IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be quiet 21 August and quiet to unsettled 22 – 23 August.
III. Event Probabilities 21 Aug-23 Aug
- Class M 01/01/01
- Class X 01/01/01
- Proton 01/01/01
- PCAF Green
IV. Penticton 10.7 cm Flux
- Observed 20 Aug 069
- Predicted 21 Aug-23 Aug 070/070/070
- 90 Day Mean 20 Aug 071
V. Geomagnetic A Indices
- Observed Afr/Ap 19 Aug 002/003
- Estimated Afr/Ap 20 Aug 002/003
- Predicted Afr/Ap 21 Aug-23 Aug 002/005-006/008-004/005
VI. Geomagnetic Activity Probabilities 21 Aug-23 Aug
A. Middle Latitudes
- Active 15/20/15
- Minor storm 01/05/01
- Major-severe storm 01/01/01
B. High Latitudes
- Active 20/25/20
- Minor storm 05/10/05
- Major-severe storm 01/01/01