- Press Release
- September 25, 2022
Joint USAF/NOAA Report of Solar and Geophysical Activity 29 Dec 2005
Product: Report of Solar-Geophysical Activity
Issued: 2005 Dec 29 2200 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 363 Issued at 2200Z on 29 Dec 2005
IA. Analysis of Solar Active Regions and Activity from 28/2100Z to 29/2100Z: Activity was at low levels. Region 843 (N12E27) produced the largest flare of the period, a C1/Sf event that occurred at 28/2238Z. Region 844 (S15W59) is a Cao beta spot group that was numbered today.
IB. Solar Activity Forecast: Solar activity is expected to be at low levels.
IIA. Geophysical Activity Summary 28/2100Z to 29/2100Z: The geomagnetic field was at quiet to unsettled levels.
IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be at predominantly unsettled levels. Isolated active periods may be possible on 30 December due to a favorably positioned coronal hole. Quiet to unsettled levels are expected on 31 December and 01 January as the coronal hole moves out geoeffective position.
III. Event Probabilities 30 Dec-01 Jan
- Class M 01/01/01
- Class X 01/01/01
- Proton 01/01/01
- PCAF green
IV. Penticton 10.7 cm Flux
- Observed 29 Dec 090
- Predicted 30 Dec-01 Jan 090/090/085
- 90 Day Mean 29 Dec 084
V. Geomagnetic A Indices
- Observed Afr/Ap 28 Dec 013/014
- Estimated Afr/Ap 29 Dec 010/012
- Predicted Afr/Ap 30 Dec-01 Jan 008/010-005/010-005/008
VI. Geomagnetic Activity Probabilities 30 Dec-01 Jan
A. Middle Latitudes
- Active 15/15/15
- Minor storm 05/01/01
- Major-severe storm 01/01/01
B. High Latitudes
- Active 20/20/20
- Minor storm 10/10/05
- Major-severe storm 05/05/01