Joint USAF/NOAA Report of Solar and Geophysical Activity 31 Mar 2009

Product: Report of Solar-Geophysical Activity
Issued: 2009 Mar 31 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 090 Issued at 2200Z on 31 Mar 2009

IA. Analysis of Solar Active Regions and Activity from 30/2100Z to 31/2100Z: Solar activity was very low. No flares were observed during the past 24 hours. The visible disk was spotless.

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

IIA. Geophysical Activity Summary 30/2100Z to 31/2100Z: The geomagnetic field was quiet.

IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be predominantly quiet for the next three days (1-3 April).

III. Event Probabilities 01 Apr-03 Apr

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

IV. Penticton 10.7 cm Flux

• Observed 31 Mar 071
• Predicted 01 Apr-03 Apr 072/072/072
• 90 Day Mean 31 Mar 070

V. Geomagnetic A Indices

• Observed Afr/Ap 30 Mar 003/004
• Estimated Afr/Ap 31 Mar 003/005
• Predicted Afr/Ap 01 Apr-03 Apr 005/005-005/005-007/008

VI. Geomagnetic Activity Probabilities 01 Apr-03 Apr

A. Middle Latitudes

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

B. High Latitudes

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