Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 089 Issued at 2200Z on 30 Mar 2005
IA. Analysis of Solar Active Regions and Activity from 29/2100Z
to 30/2100Z: Solar activity was at very low levels today. Region
745 (N12W68) continues to show signs of decay. There is a single
AXX alpha spot remaining visible in white light. No significant
activity was observed on the disk or limbs during the period. No
new regions were numbered today.
IB. Solar Activity Forecast: Solar activity is expected to be at
very low levels.
IIA. Geophysical Activity Summary 29/2100Z to 30/2100Z:
The geomagnetic field was at predominantly quiet to unsettled levels.
Active conditions were observed following a sustained southward Bz
between 30/0600 and 0900Z. The greater than 2 MeV electron flux at
geosynchronous orbit reached high levels today.
IIB. Geophysical Activity Forecast: The geomagnetic field is
expected to be at quiet to unsettled levels. Isolated active to
minor storm conditions are possible on 2 April due to the onset of a
recurrent high speed coronal hole stream.
III. Event Probabilities 31 Mar-02 Apr
Class M 01/01/01
Class X 01/01/01
Proton 01/01/01
PCAF green
IV. Penticton 10.7 cm Flux
Observed 30 Mar 078
Predicted 31 Mar-02 Apr 080/080/085
90 Day Mean 30 Mar 097
V. Geomagnetic A Indices
Observed Afr/Ap 29 Mar 003/005
Estimated Afr/Ap 30 Mar 008/009
Predicted Afr/Ap 31 Mar-02 Apr 005/005-008/008-015/015
VI. Geomagnetic Activity Probabilities 31 Mar-02 Apr
A. Middle Latitudes
Active 15/20/30
Minor storm 01/05/10
Major-severe storm 01/01/05
B. High Latitudes
Active 15/20/30
Minor storm 01/05/10
Major-severe storm 01/01/05
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
Contesting Propagation eReflector:
http://lists.contesting.com/mailman/listinfo/propagation
HC-DX Propagation Channel:
http://www.hard-core-dx.com/index.php?topic=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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