Joint USAF/NOAA Report of Solar and Geophysical Activity 31 Mar 2006

Product: Report of Solar-Geophysical Activity
Issued: 2006 Mar 31 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 090 Issued at 2200Z on 31 Mar 2006

IA. Analysis of Solar Active Regions and Activity from 30/2100Z to 31/2100Z: Solar activity was very low. Today’s activity consisted of a few, low-level B-class events. Region 865 (S13E20) has shown continued slow growth during the past 24 hours.

IB. Solar Activity Forecast: Solar activity is expected to be very low to low during the next three days (01-03 Apr).

IIA. Geophysical Activity Summary 30/2100Z to 31/2100Z: The geomagnetic field was quiet during the past 24 hours.

IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be quiet to unsettled for the next three days (01-03 Apr).

III. Event Probabilities 01 Apr-03 Apr

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

IV. Penticton 10.7 cm Flux

• Observed 31 Mar 086
• Predicted 01 Apr-03 Apr 085/085/085
• 90 Day Mean 31 Mar 079

V. Geomagnetic A Indices

• Observed Afr/Ap 30 Mar 002/004
• Estimated Afr/Ap 31 Mar 005/006
• Predicted Afr/Ap 01 Apr-03 Apr 005/005-008/010-008/010

VI. Geomagnetic Activity Probabilities 01 Apr-03 Apr

A. Middle Latitudes

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

B. High Latitudes

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