Joint USAF/NOAA Report of Solar and Geophysical Activity 23 Jun 2007

Product: Report of Solar-Geophysical Activity
Issued: 2007 Jun 23 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 174 Issued at 2200Z on 23 Jun 2007

IA. Analysis of Solar Active Regions and Activity from 22/2100Z to 23/2100Z: Solar activity was very low. The visible disk remains spotless.

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

IIA. Geophysical Activity Summary 22/2100Z to 23/2100Z: The geomagnetic field was quiet to unsettled due to a recurrent coronal hole high speed stream.

IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be quiet to unsettled for June 24 -25. There remains the chance for isolated active periods. The geomagnetic field is expected to be quiet for June 26.

III. Event Probabilities 24 Jun-26 Jun

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

IV. Penticton 10.7 cm Flux

• Observed 23 Jun 066
• Predicted 24 Jun-26 Jun 068/068/070
• 90 Day Mean 23 Jun 074

V. Geomagnetic A Indices

• Observed Afr/Ap 22 Jun 012/016
• Estimated Afr/Ap 23 Jun 006/012
• Predicted Afr/Ap 24 Jun-26 Jun 006/012-006/008-003/008

VI. Geomagnetic Activity Probabilities 24 Jun-26 Jun

A. Middle Latitudes

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

B. High Latitudes

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