Joint USAF/NOAA Report of Solar and Geophysical Activity 23 Jul 2007

Product: Report of Solar-Geophysical Activity
Issued: 2007 Jul 23 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 204 Issued at 2200Z on 23 Jul 2007
IA. Analysis of Solar Active Regions and Activity from 22/2100Z to 23/2100Z: Solar activity was very low. The visible disk remains spotless.
IB. Solar Activity Forecast: Solar activity is expected to remain very low.
IIA. Geophysical Activity Summary 22/2100Z to 23/2100Z: The geomagnetic field was quiet.
IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be quiet 24 – 25 July. On 26 July the geomagnetic field is expected to be unsettled to active as a recurrent coronal hole rotates into a geoeffective position.
III. Event Probabilities 24 Jul-26 Jul
- Class M 01/01/01
- Class X 01/01/01
- Proton 01/01/01
- PCAF Green
IV. Penticton 10.7 cm Flux
- Observed 23 Jul 067
- Predicted 24 Jul-26 Jul 068/068/068
- 90 Day Mean 23 Jul 074
V. Geomagnetic A Indices
- Observed Afr/Ap 22 Jul 003/004
- Estimated Afr/Ap 23 Jul 003/005
- Predicted Afr/Ap 24 Jul-26 Jul 005/005-005/005-010/015
VI. Geomagnetic Activity Probabilities 24 Jul-26 Jul
A. Middle Latitudes
- Active 10/10/30
- Minor storm 05/05/15
- Major-severe storm 01/01/01
B. High Latitudes
- Active 15/20/35
- Minor storm 05/10/20
- Major-severe storm 01/05/10