Joint USAF/NOAA Report of Solar and Geophysical Activity 10 Sep 2007

Product: Report of Solar-Geophysical Activity
Issued: 2007 Sep 10 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 253 Issued at 2200Z on 10 Sep 2007

IA. Analysis of Solar Active Regions and Activity from 09/2100Z to 10/2100Z: Solar activity was very low. The visible solar disk remains spotless.

IB. Solar Activity Forecast: Solar activity is expected to be very low.

IIA. Geophysical Activity Summary 09/2100Z to 10/2100Z: The geomagnetic field was quiet. The greater than 2 MeV electron flux at geosynchronous orbit reached high levels again today.

IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be mostly quiet for the next three days (11 – 13 September).

III. Event Probabilities 11 Sep-13 Sep

• Class M 01/01/01
• Class X 01/01/01
• Proton 01/01/01
• PCAF Green

IV. Penticton 10.7 cm Flux

• Observed 10 Sep 067
• Predicted 11 Sep-13 Sep 067/067/067
• 90 Day Mean 10 Sep 070

V. Geomagnetic A Indices

• Observed Afr/Ap 09 Sep 002/002
• Estimated Afr/Ap 10 Sep 002/003
• Predicted Afr/Ap 11 Sep-13 Sep 005/005-005/005-005/005

VI. Geomagnetic Activity Probabilities 11 Sep-13 Sep

A. Middle Latitudes

• Active 10/10/10
• Minor storm 01/01/01
• Major-severe storm 01/01/01

B. High Latitudes

• Active 15/15/15
• Minor storm 05/05/05
• Major-severe storm 01/01/01