Joint USAF/NOAA Report of Solar and Geophysical Activity 25 Jun 2007

Product: Report of Solar-Geophysical Activity
Issued: 2007 Jun 25 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 176 Issued at 2200Z on 25 Jun 2007

IA. Analysis of Solar Active Regions and Activity from 24/2100Z to 25/2100Z: Solar activity was very low. New region 961 (S09E77) is currently classified as an Hsx alpha sunspot group. No significant flares have occurred in the past 24 hours.

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

IIA. Geophysical Activity Summary 24/2100Z to 25/2100Z: The geomagnetic field was quiet. The greater than 2 MeV electron flux at geosynchronous orbit reached high levels today.

IIB. Geophysical Activity Forecast: The geomagnetic field is expected to remain quiet from 26 to 28 June.

III. Event Probabilities 26 Jun-28 Jun

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

IV. Penticton 10.7 cm Flux

• Observed 25 Jun 068
• Predicted 26 Jun-28 Jun 070/075/080
• 90 Day Mean 25 Jun 073

V. Geomagnetic A Indices

• Observed Afr/Ap 24 Jun 004/006
• Estimated Afr/Ap 25 Jun 003/005
• Predicted Afr/Ap 26 Jun-28 Jun 003/005-003/005-005/005

VI. Geomagnetic Activity Probabilities 26 Jun-28 Jun

A. Middle Latitudes

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

B. High Latitudes

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