Joint USAF/NOAA Report of Solar and Geophysical Activity 27 Jun 2007

Product: Report of Solar-Geophysical Activity
Issued: 2007 Jun 27 2234 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 178 Issued at 2200Z on 27 Jun 2007

IA. Analysis of Solar Active Regions and Activity from 26/2100Z to 27/2100Z: Solar activity was low. A C1 flare occurred at 27/1800Z.

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.

IIA. Geophysical Activity Summary 26/2100Z to 27/2100Z: 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 30 June due to a recurrent coronal hole high speed stream.

III. Event Probabilities 28 Jun-30 Jun

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

IV. Penticton 10.7 cm Flux

• Observed 27 Jun 073
• Predicted 28 Jun-30 Jun 080/080/080
• 90 Day Mean 27 Jun 074

V. Geomagnetic A Indices

• Observed Afr/Ap 26 Jun 004/005
• Estimated Afr/Ap 27 Jun 005/005
• Predicted Afr/Ap 28 Jun-30 Jun 005/005-006/008-008/010

VI. Geomagnetic Activity Probabilities 28 Jun-30 Jun

A. Middle Latitudes

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

B. High Latitudes

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