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

Product: Report of Solar-Geophysical Activity
Issued: 2007 Nov 23 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 327 Issued at 2200Z on 23 Nov 2007

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

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 active with minor storm conditions at high latitudes. Solar wind observations from the ACE spacecraft indicate a continued influence of the coronal hole high speed stream. Solar wind speeds began the past 24 hour period at 620 km/s and are currently averaging around 550 km/s.

IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be quiet to unsettled for 24-26 November.

III. Event Probabilities 24 Nov-26 Nov

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

IV. Penticton 10.7 cm Flux

• Observed 23 Nov 070
• Predicted 24 Nov-26 Nov 070/070/070
• 90 Day Mean 23 Nov 068

V. Geomagnetic A Indices

• Observed Afr/Ap 22 Nov 006/013
• Estimated Afr/Ap 23 Nov 010/010
• Predicted Afr/Ap 24 Nov-26 Nov 008/010-008/015-008/010

VI. Geomagnetic Activity Probabilities 24 Nov-26 Nov

A. Middle Latitudes

• Active 15/15/15
• Minor storm 05/05/05
• Major-severe storm 01/01/0

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B. High Latitudes

• Active 20/20/20
• Minor storm 10/10/10
• Major-severe storm 05/05/05