Joint USAF/NOAA Report of Solar and Geophysical Activity 27 Oct 2005
Prepared jointly by the U.S. Dept. of Commerce, NOAA, Space Environment Center and the U.S. Air Force. Updated 2005 Oct 27 2204 UTC
Joint USAF/NOAA Report of Solar and Geophysical Activity SDF Number 300 Issued at 2200Z on 27 Oct 2005
IA. Analysis of Solar Active Regions and Activity from 26/2100Z to 27/2100Z: Solar activity was at very low levels. No sunspots were reported on the visible disk. No new regions were numbered today.
IB. Solar Activity Forecast: Solar activity is expected to be at very low levels.
IIA. Geophysical Activity Summary 26/2100Z to 27/2100Z: The geomagnetic field was at quiet to unsettled levels. Solar wind speed has steadily decreased thoughout the day and is now at approximately 460 km/s.
IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be at quiet to unsettled levels. Isolated active periods are possible on 28 and 29 October due to the geoeffective coronal hole high speed stream.
III. Event Probabilities 28 Oct-30 Oct
- Class M 01/01/01
- Class X 01/01/01
- Proton 01/01/01
- PCAF green
IV. Penticton 10.7 cm Flux
- Observed 27 Oct 072
- Predicted 28 Oct-30 Oct 070/070/070
- 90 Day Mean 27 Oct 087
V. Geomagnetic A Indices
- Observed Afr/Ap 26 Oct 008/008
- Estimated Afr/Ap 27 Oct 006/008
- Predicted Afr/Ap 28 Oct-30 Oct 010/015-010/012-005/008
VI. Geomagnetic Activity Probabilities 28 Oct-30 Oct
A. Middle Latitudes
- Active 25/25/20
- Minor storm 15/15/10
- Major-severe storm 05/05/01
B. High Latitudes
- Active 30/30/15
- Minor storm 20/20/10
- Major-severe storm 05/05/01
