Joint USAF/NOAA Report of Solar and Geophysical Activity 21 Sep 2008
Product: Report of Solar-Geophysical Activity
Issued: 2008 Sep 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 265 Issued at 2200Z on 21 Sep 2008
IA. Analysis of Solar Active Regions and Activity from 20/2100Z to 21/2100Z: Solar activity was very low. No flares were observed during the past 24 hours. The visible disk remained spotless.
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 quiet.
IIB. Geophysical Activity Forecast: The geomagnetic field is expected to remain at quiet levels for the forecast period (22 – 24 September).
III. Event Probabilities 22 Sep-24 Sep
- Class M 01/01/01
- Class X 01/01/01
- Proton 01/01/01
- PCAF Green
IV. Penticton 10.7 cm Flux
- Observed 21 Sep 068
- Predicted 22 Sep-24 Sep 067/067/067
- 90 Day Mean 21 Sep 066
V. Geomagnetic A Indices
- Observed Afr/Ap 20 Sep 001/003
- Estimated Afr/Ap 21 Sep 002/005
- Predicted Afr/Ap 22 Sep-24 Sep 005/005-005/005-005/005
VI. Geomagnetic Activity Probabilities 22 Sep-24 Sep
A. Middle Latitudes
- Active 10/10/10
- Minor storm 01/01/01
- Major-severe storm 01/01/01
B. High Latitudes
- Active 10/10/10
- Minor storm 01/01/01
- Major-severe storm 01/01/01