[Ips-hf-warning] SWS HF COMMS WARNING issued 2318 UT on 09 Dec 2018 [SEC=UNCLASSIFIED]

[rwc]

SUBJ: SWS HF RADIO COMMUNICATIONS WARNING 18/24
ISSUED AT 2317UT/09 DECEMBER 2018
BY THE AUSTRALIAN SPACE FORECAST CENTRE.

MUF depressions of 15% to 25% are expected for the UT day 10 
December 2018 due to continued very low levels of ionising radiation 
from the Sun and recent increase in geomagnetic activity.

DEGRADED HF PROPAGATION CONDITIONS EXPECTED
FOR 10 DECEMBER 2018
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
_____________________________________________________________
10 Dec:  -35          -12%      2  4  6  8 12 16 16 22

Space Weather Services              email: asfc at bom.gov.au
Bureau of Meteorology
PO Box 1386                         WWW: http://www.sws.bom.gov.au
Haymarket NSW 1240  AUSTRALIA       FTP: ftp://ftp-out.sws.bom.gov.au
tel: +61 2 9213 8010                fax: +61 2 9213 8060 

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