Joint USAF/NOAA Report of Solar and Geophysical Activity 13 May 2007

Product: Report of Solar-Geophysical Activity
Issued: 2007 May 13 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 133 Issued at 2200Z on 13 May 2007

IA. Analysis of Solar Active Regions and Activity from 12/2100Z to 13/2100Z: Solar activity was very low.

IB. Solar Activity Forecast: Solar activity is expected to be very low to low. C-class activity is possible in Region 955 (S09W35).

IIA. Geophysical Activity Summary 12/2100Z to 13/2100Z: The geomagnetic field was quiet.

IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be quiet.

III. Event Probabilities 14 May-16 May

• Class M 05/05/05
• Class X 01/01/01
• Proton 01/01/01
• PCAF Green

IV. Penticton 10.7 cm Flux

• Observed 13 May 074
• Predicted 14 May-16 May 072/072/072
• 90 Day Mean 13 May 074

V. Geomagnetic A Indices

• Observed Afr/Ap 12 May 002/003
• Estimated Afr/Ap 13 May 003/005
• Predicted Afr/Ap 14 May-16 May 005/005-005/008-005/005

VI. Geomagnetic Activity Probabilities 14 May-16 May

A. Middle Latitudes

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

B. High Latitudes

• Active 20/20/20
• Minor storm 05/05/05
• Major-severe storm 01/01/01