Joint USAF/NOAA Report of Solar and Geophysical Activity 27 Nov 2008

Product: Report of Solar-Geophysical Activity
Issued: 2008 Nov 27 2200 UTC
Prepared jointly by the U.S. Dept. of Commerce, NOAA,
Space Weather Prediction Center and the U.S. Air Force.

Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 332 Issued at 2200Z on 27 Nov 2008

IA. Analysis of Solar Active Regions and Activity from 26/2100Z to 27/2100Z: Solar activity was very low. No flares were observed during the past 24 hours. The visible disk remained spotless.

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

IIA. Geophysical Activity Summary 26/2100Z to 27/2100Z: The geomagnetic field was quiet to unsettled. Solar wind velocities measured at the ACE satellite showed a steady decline during the past 24 hours, ending the period at 487 km/s.

IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be quiet for the next three days (27-29 November) as the high speed stream rotates out of geoeffective position. Isolated unsettled conditions are possible at high latitudes during the period.

III. Event Probabilities 28 Nov-30 Nov

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

IV. Penticton 10.7 cm Flux

• Observed 27 Nov 068
• Predicted 28 Nov-30 Nov 069/069/069
• 90 Day Mean 27 Nov 068

V. Geomagnetic A Indices

• Observed Afr/Ap 26 Nov 011/008
• Estimated Afr/Ap 27 Nov 007/008
• Predicted Afr/Ap 28 Nov-30 Nov 005/005-005/005-005/005

VI. Geomagnetic Activity Probabilities 28 Nov-30 Nov

A. Middle Latitudes

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

B. High Latitudes

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