[Ips-hf-warning] IPS HF COMMS WARNING

[Regional Warning Centre]

SUBJ: IPS HF RADIO COMMUNICATIONS WARNING 00/74
ISSUED AT 05/2210Z NOVEMBER 2000
BY THE AUSTRALIAN SPACE FORECAST CENTRE.

SOUTHERN REGION MUFS DEPRESSED 15 PERCENT AFTER 
LOCAL DAWN THIS MORNING. MILD DEPRESSION FOLLOWS
MILD GEOMAGNETIC ACTIVITY ASSOCIATED WITH A RECENT
CORONAL MASS EJECTION.

DEGRADED HF PROPAGATION CONDITIONS EXPECTED
EARLY IN UT DAY FOR 06 NOVEMBER 2000 SOUTHERN REGION
AUS/NZ ONLY. MUFS SHOULD RECOVER AS DAY PROGRESSES.

NORTHERN REGION MUFS SHOULD REMAIN NEAR PREDICTED MONTHLY 
VALUES AND COMMUNICATORS IN THIS REGION SHOULD CONTINUE
TO USE THE MONTHLY T OF AROUND 135.

IF COMMS DIFFICULTIES EXPERIENCED TRY A LOWER FREQUENCY BAND
-------------------------------------------------------------
SOLAR ACTIVITY FORECAST       HF COMMS FADEOUTS             
06 Nov:  Low to moderate      Possible             

HF COMMUNICATIONS FORECAST (SOUTHERN AUSTRALIAN/NEW ZEALAND REGION)
                                   FREQUENCY BANDS  
       T-index  MUFs          2  4  6  8 12 16 22 26
-------------------------------------------------------------
6 Nov   90     -15%           2  4  6  8 12 12 16 22 


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