[Ips-hf-warning] IPS HF COMMS WARNING

[rwc]

SUBJ: IPS PRELIMINARY HF RADIO COMMUNICATIONS WARNING 03/74
ISSUED AT 22/2329Z OCTOBER 2003
BY THE AUSTRALIAN SPACE FORECAST CENTRE.

LOWER THAN NORMAL MUFS MAY BE EXPERIENCED IN 
SOUTHERN REGION AUS/NZ THIS MORNING. RECENT
DEPRESSIONS WERE DUE TO SOLAR CORONAL HOLE
WIND STREAM INDUCED ACTIVITY. THE EARTH HAS
NOW LEFT THIS WIND STREAM AND THIS MORNING 
DEPRESSIONS ARE NOT EXPECTED TO PERSIST.

HOWEVER DEGRADED HF PROPAGATION CONDITIONS EXPECTED
FROM 24-25 OCTOBER 2003 IN ASSOCIATION WITH 
ANTICIPATED GEOMAGNETIC ACTIVITY FROM EXPECTED
CORONAL MASS EJECTION ARRIVAL. GENERAL DEPRESSION EXPECTED.

IF COMMS DIFFICULTIES EXPERIENCED TRY A LOWER FREQUENCY BAND
A MORE DETAILED HF WARNING WILL FOLLOW IF DEPRESSIONS EVENTUATE.
_____________________________________________________________



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