Joint USAF/NOAA Report of Solar and Geophysical Activity 28 Jun 2007

Product: Report of Solar-Geophysical Activity
Issued: 2007 Jun 28 2251 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 179 Issued at 2200Z on 28 Jun 2007

IA. Analysis of Solar Active Regions and Activity from 27/2100Z to 28/2100Z: Solar activity was very low. Region 961 (S11E36) remains relatively unchanged since yesterday. New Region 962 (S12E67) rotated onto the visible disk and is currently classified as a Bxo beta sunspot group.

IB. Solar Activity Forecast: Solar activity is expected to be very low to low. There is a slight chance for an isolated M-class flare from Region 962.

IIA. Geophysical Activity Summary 27/2100Z to 28/2100Z: The geomagnetic field was quiet.

IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be quiet to unsettled. Isolated active periods are possible on 29-30 June due to a recurrent coronal hole high speed stream.

III. Event Probabilities 29 Jun-01 Jul

• Class M 15/15/15
• Class X 01/01/01
• Proton 01/01/01
• PCAF Green

IV. Penticton 10.7 cm Flux

• Observed 28 Jun 075
• Predicted 29 Jun-01 Jul 080/080/080
• 90 Day Mean 28 Jun 074

V. Geomagnetic A Indices

• Observed Afr/Ap 27 Jun 005/005
• Estimated Afr/Ap 28 Jun 004/005
• Predicted Afr/Ap 29 Jun-01 Jul 008/008-008/010-006/008

VI. Geomagnetic Activity Probabilities 29 Jun-01 Jul

A. Middle Latitudes

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

B. High Latitudes

• Active 25/35/25
• Minor storm 15/20/15
• Major-severe storm 01/05/01