Joint USAF/NOAA Report of Solar and Geophysical Activity 29 Mar 2007

Product: Report of Solar-Geophysical Activity
Issued: 2007 Mar 29 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 088 Issued at 2200Z on 29 Mar 2007

IA. Analysis of Solar Active Regions and Activity from 28/2100Z to 29/2100Z: Solar activity was very low. Solar X-rays remained below B-level during the past 24 hours. Region 949 (N06E48) is a small C-type group and is the only spotted group on the disk.

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

IIA. Geophysical Activity Summary 28/2100Z to 29/2100Z: The geomagnetic field was quiet during the past 24 hours.

IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be quiet for the next two days (30-31 March). An increase to unsettled levels with a chance for active periods is expected sometime late on the third day (1 April) due to a recurrent high speed stream from a favorably positioned coronal hole.

III. Event Probabilities 30 Mar-01 Apr

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

IV. Penticton 10.7 cm Flux

• Observed 29 Mar 074
• Predicted 30 Mar-01 Apr 075/075/075
• 90 Day Mean 29 Mar 078

V. Geomagnetic A Indices

• Observed Afr/Ap 28 Mar 006/007
• Estimated Afr/Ap 29 Mar 005/005
• Predicted Afr/Ap 30 Mar-01 Apr 005/005-005/005-007/010

VI. Geomagnetic Activity Probabilities 30 Mar-01 Apr

A. Middle Latitudes

• Active 15/15/20
• Minor storm 05/05/05
• Major-severe storm 01/01/01

B. High Latitudes

• Active 15/15/20
• Minor storm 05/05/10
• Major-severe storm 01/01/05