Joint USAF/NOAA Report of Solar and Geophysical Activity 26 Mar 2007

Product: Report of Solar-Geophysical Activity
Issued: 2007 Mar 26 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 085 Issued at 2200Z on 26 Mar 2007

IA. Analysis of Solar Active Regions and Activity from 25/2100Z to 26/2100Z: Solar activity was very low. New Region 948 (S02W44) is classified as a Dao beta group.

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

IIA. Geophysical Activity Summary 25/2100Z to 26/2100Z: The geomagnetic field was quiet to unsettled with an isolated active period. Solar wind speed remains slightly elevated at approximately 460 km/s due to the coronal hole high speed stream.

IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be quiet to unsettled with isolated active periods for the next two days due to the coronal hole high speed stream. Expect quiet conditions on 29 March.

III. Event Probabilities 27 Mar-29 Mar

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

IV. Penticton 10.7 cm Flux

• Observed 26 Mar 074
• Predicted 27 Mar-29 Mar 075/075/075
• 90 Day Mean 26 Mar 078

V. Geomagnetic A Indices

• Observed Afr/Ap 25 Mar 008/010
• Estimated Afr/Ap 26 Mar 008/010
• Predicted Afr/Ap 27 Mar-29 Mar 012/020-007/010-005/005

VI. Geomagnetic Activity Probabilities 27 Mar-29 Mar

A. Middle Latitudes

• Active 25/15/15
• Minor storm 15/10/05
• Major-severe storm 01/01/01

B. High Latitudes

• Active 40/25/15
• Minor storm 25/15/05
• Major-severe storm 15/05/01