Joint USAF/NOAA Report of Solar and Geophysical Activity 26 Nov 2007

Product: Report of Solar-Geophysical Activity
Issued: 2007 Nov 26 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 330 Issued at 2200Z on 26 Nov 2007

IA. Analysis of Solar Active Regions and Activity from 25/2100Z to 26/2100Z: Solar activity was at very low levels. Region 975 (N03W38) decayed to an AXX spot group.

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

IIA. Geophysical Activity Summary 25/2100Z to 26/2100Z: The geomagnetic field was at quiet to unsettled levels, due to the continued influence of a coronal hole high speed stream. The greater than 2 MeV electron flux at geosynchronous orbit reached high levels again today.

IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be at mostly quiet levels for the forecast period (27 to 29 November).

III. Event Probabilities 27 Nov-29 Nov

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

IV. Penticton 10.7 cm Flux

• Observed 26 Nov 072
• Predicted 27 Nov-29 Nov 070/070/070
• 90 Day Mean 26 Nov 068

V. Geomagnetic A Indices

• Observed Afr/Ap 25 Nov 008/011
• Estimated Afr/Ap 26 Nov 006/010
• Predicted Afr/Ap 27 Nov-29 Nov 005/005-005/005-005/005

VI. Geomagnetic Activity Probabilities 27 Nov-29 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