Joint USAF/NOAA Report of Solar and Geophysical Activity 26 Mar 2009

Product: Report of Solar-Geophysical Activity
Issued: 2009 Mar 26 2200 UTC
Prepared jointly by the U.S. Dept. of Commerce, NOAA,
Space Weather Prediction 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 2009

IA. Analysis of Solar Active Regions and Activity from 25/2100Z to 26/2100Z: Solar activity was very low. Two B-class flares were observed: the first was a B1.8 at 26/0143Z from an unnumbered area (N23W12), the second was a B3.5 at 26/0216Z from beyond the east limb (based on Stereo B images).

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.

IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be quiet to unsettled on day one (27 March). Days two and three (28-29 March) are expected to be quiet.

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 069
• Predicted 27 Mar-29 Mar 070/072/072
• 90 Day Mean 26 Mar 070

V. Geomagnetic A Indices

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

VI. Geomagnetic Activity Probabilities 27 Mar-29 Mar

A. Middle Latitudes

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

B. High Latitudes

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