Joint USAF/NOAA Report of Solar and Geophysical Activity 30 Mar 2007

Product: Report of Solar-Geophysical Activity
Issued: 2007 Mar 30 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 089 Issued at 2200Z on 30 Mar 2007

IA. Analysis of Solar Active Regions and Activity from 29/2100Z to 30/2100Z: Solar activity was very low. No flares occurred during the past 24 hours.

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

IIA. Geophysical Activity Summary 29/2100Z to 30/2100Z: The geomagnetic field was mostly quiet during the past 24 hours.

IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be quiet tomorrow (31 March). An increase to unsettled to active with a chance for minor storm periods is expected, beginning late on the second day (1 April) and continuing through the third day (2 April). The increase is expected in response to a favorably positioned coronal hole.

III. Event Probabilities 31 Mar-02 Apr

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

IV. Penticton 10.7 cm Flux

• Observed 30 Mar 074
• Predicted 31 Mar-02 Apr 074/074/074
• 90 Day Mean 30 Mar 078

V. Geomagnetic A Indices

• Observed Afr/Ap 29 Mar 002/002
• Estimated Afr/Ap 30 Mar 005/005
• Predicted Afr/Ap 31 Mar-02 Apr 005/005-007/010-015/025

VI. Geomagnetic Activity Probabilities 31 Mar-02 Apr

A. Middle Latitudes

• Active 15/20/30
• Minor storm 05/10/20
• Major-severe storm 01/01/05

B. High Latitudes

• Active 15/25/35
• Minor storm 05/15/25
• Major-severe storm 01/05/10