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

Product: Report of Solar-Geophysical Activity
Issued: 2007 May 30 2231 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 150 Issued at 2200Z on 30 May 2007

IA. Analysis of Solar Active Regions and Activity from 29/2100Z to 30/2100Z: Solar activity increased to low levels today. Region 958 (S13E49) continues to show decay. A C2 x-ray flare occurred at 30/1349Z and it is believed to have had a source region just off the east limb near S09E90. No new regions were numbered today.

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

IIA. Geophysical Activity Summary 29/2100Z to 30/2100Z: The geomagnetic field was at quiet levels. The greater than 2 MeV electron flux at geosynchronous orbit reached high levels today.

IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be at predominantly quiet levels throughout the forecast period.

III. Event Probabilities 31 May-02 Jun

• Class M 10/10/10
• Class X 01/01/01
• Proton 01/01/01
• PCAF Green

IV. Penticton 10.7 cm Flux

• Observed 30 May 071
• Predicted 31 May-02 Jun 072/074/075
• 90 Day Mean 30 May 073

V. Geomagnetic A Indices

• Observed Afr/Ap 29 May 005/004
• Estimated Afr/Ap 30 May 005/005
• Predicted Afr/Ap 31 May-02 Jun 003/005-003/005-003/005

VI. Geomagnetic Activity Probabilities 31 May-02 Jun

A. Middle Latitudes

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

B. High Latitudes

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