Joint USAF/NOAA Report of Solar and Geophysical Activity 31 Jul 2007

Product: Report of Solar-Geophysical Activity
Issued: 2007 Jul 31 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 212 Issued at 2200Z on 31 Jul 2007
IA. Analysis of Solar Active Regions and Activity from 30/2100Z to 31/2100Z: Solar activity was very low.
IB. Solar Activity Forecast: Solar activity is expected to be very low.
IIA. Geophysical Activity Summary 30/2100Z to 31/2100Z: The geomagnetic field was quiet to unsettled.
IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be quiet to unsettled with a chance for isolated active periods on 01 August due to continued coronal hole effects. Expect mostly quiet conditions on 02 – 03 August.
III. Event Probabilities 01 Aug-03 Aug
- Class M 01/01/01
- Class X 01/01/01
- Proton 01/01/01
- PCAF Green
IV. Penticton 10.7 cm Flux
- Observed 31 Jul 068
- Predicted 01 Aug-03 Aug 070/070/070
- 90 Day Mean 31 Jul 073
V. Geomagnetic A Indices
- Observed Afr/Ap 30 Jul 010/010
- Estimated Afr/Ap 31 Jul 005/008
- Predicted Afr/Ap 01 Aug-03 Aug 008/010-005/005-005/005
VI. Geomagnetic Activity Probabilities 01 Aug-03 Aug
A. Middle Latitudes
- Active 15/10/10
- Minor storm 05/01/01
- Major-severe storm 01/01/01
B. High Latitudes
- Active 25/15/15
- Minor storm 05/01/01
- Major-severe storm 01/01/01