[Ips-hf-warning] ASWFC HF DEPRESSION WARNING issued 2336 UT on 23 Mar 2023 [SEC=OFFICIAL]

[rwc]

SUBJ: ASWFC HF RADIO COMMUNICATIONS WARNING 23/32
ISSUED AT 2333UT/23 MARCH 2023
BY THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE.

Degraded HF conditions were observed during local night hours 
for southern region Australia with strong spread F observed at 
Canberra, Norfolk Island and Hobart. Aurora displays were seen 
at Canberra overnight in association with unexpected strong overnight 
geomagnetic storm activity. Southern region Australia MUFs are now
expected to be depressed 15-20%. MUFs for northern region Australia 
are expected to remain enhanced by 20-30%.

DEGRADED HF PROPAGATION CONDITIONS EXPECTED
FOR 24 MARCH 2023 SOUTHERN AUSTRALIAN REGION.
IF COMMS DIFFICULTIES EXPERIENCED TRY A LOWER FREQUENCY BAND
_____________________________________________________________

HF COMMUNICATIONS FORECAST (AUSTRALIAN/NEW ZEALAND REGION)
                                   FREQUENCY BANDS
       T-index      MUFs        2  4  6  8 12 16 22 26
_____________________________________________________________
24 Mar:   65        -20%        2  4  6  8  8 12 16 16

Australian Space Weather Forecasting Centre
Bureau of Meteorology
ASWFC at bom.gov.au
www.bom.gov.au | www.sws.bom.gov.au