Joint USAF/NOAA Report of Solar and Geophysical Activity 30 Mar 2008

Product: Report of Solar-Geophysical Activity
Issued: 2008 Mar 30 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 30 Mar 2008

IA. Analysis of Solar Active Regions and Activity from 29/2100Z to 30/2100Z: Solar activity was very low. The three spotted regions on the disk continue to be stable and are generally declining.

IB. Solar Activity Forecast: Solar activity is expected to be predominantly very low. There is, however, a chance for an isolated C-class event during the next three days (31 March – 02 April).

IIA. Geophysical Activity Summary 29/2100Z to 30/2100Z: The geomagnetic field was mostly quiet to unsettled during the past 24 hours. There was one isolated active period from 0000-0300Z. The greater than 2 MeV electron flux at geosynchronous orbit was at high levels.

IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be quiet to unsettled for the first day (31 March) and should be generally quiet for the second and third days (01-02 April).

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 081
• Predicted 31 Mar-02 Apr 080/080/075
• 90 Day Mean 30 Mar 073

V. Geomagnetic A Indices

• Observed Afr/Ap 29 Mar 006/008
• Estimated Afr/Ap 30 Mar 007/008
• Predicted Afr/Ap 31 Mar-02 Apr 005/008-005/005-005/005

VI. Geomagnetic Activity Probabilities 31 Mar-02 Apr

A. Middle Latitudes

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

B. High Latitudes

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