[Propagation] Joint USAF/NOAA Report of Solar and GeophysicalActivity

["Thomas Giella KN4LF" <kn4lf@tampabay.rr.com>]

Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 032 Issued at 2200Z on 01 Feb 2005

IA.  Analysis of Solar Active Regions and Activity from  31/2100Z
to 01/2100Z:  Solar activity was very low. The two sunspot regions on
the visible disk, Regions 727 (S09W68) and 729 (S08E06), were quiet
and stable. A 9 degree filament erupted from near S15W16 at
01/0800Z, but there was no apparent CME on LASCO imagery. An
impressive backside full halo CME was observed on LASCO imagery at
01/1106Z. The likely source of this eruption was old Region 720
(N13, L=178), which is due to return to the visible disk on 05
February. A Type II radio sweep (660 km/s) and a 245 MHz burst of
9800 sfu were observed at 01/1032Z, and were likely associated with
this backside CME.

IB.  Solar Activity Forecast:  Solar activity is expected to be very
low. The activity level is expected to increase after 05 February
when old Region 720 returns to the visible disk.

IIA.  Geophysical Activity Summary 31/2100Z to 01/2100Z:
The geomagnetic field was quiet to unsettled. Solar wind speed
remains elevated, but gradually declined from near 620 km/s to 530
km/s to end the period. The greater than 2 MeV electron flux at
geosynchronous orbit was at high levels today.

IIB.  Geophysical Activity Forecast:  The geomagnetic field is
expected to continue at quiet to unsettled levels.

III.  Event Probabilities 02 Feb-04 Feb
Class M    05/05/05
Class X    01/01/01
Proton     01/01/01
PCAF       green

IV.  Penticton 10.7 cm Flux
Observed           01 Feb 084
Predicted   02 Feb-04 Feb  085/085/085
90 Day Mean        01 Feb 102

V.  Geomagnetic A Indices
Observed Afr/Ap 31 Jan  015/019
Estimated Afr/Ap 01 Feb  010/010
Predicted Afr/Ap 02 Feb-04 Feb  012/012-010/010-010/010

VI.  Geomagnetic Activity Probabilities 02 Feb-04 Feb
A.  Middle Latitudes
Active                25/20/20
Minor storm           05/05/05
Major-severe storm    01/01/01
B.  High Latitudes
Active                30/25/25
Minor storm           10/10/10
Major-severe storm    01/01/01
73 & GUD DX,
Thomas F. Giella, KN4LF
Retired Space & Atmospheric Weather Forecaster
Plant City, FL, USA
Grid Square EL87WX
Lat & Long 27 58 33.6397 N 82 09 52.4052 W
kn4lf@arrl.net

Propagation eReflector: 
http://lists.contesting.com/mailman/listinfo/propagation
KN4LF Daily Solar Space Weather & Geomagnetic Data Archive: 
http://www.kn4lf.com/kn4lf5.htm
KN4LF Daily LF/MF/HF Radio Propagation Outlook: 
http://www.kn4lf.com/kn4lf6.htm
KN4LF HF/MF Radio Propagation Theory Notes: http://www.kn4lf.com/kn4lf8.htm
KN4LF Amateur & SWL Radio History: http://www.kn4lf.com/index.htm




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