[Ips-hf-warning] SWS HF COMMS WARNING issued 2356 UT on 19 Jan 2017 [SEC=UNCLASSIFIED]

[rwc]

SUBJ: SWS HF RADIO COMMUNICATIONS WARNING 17/07
ISSUED AT 2355UT/19 JANUARY 2017
BY THE AUSTRALIAN SPACE FORECAST CENTRE.

The Earth's ionosphere is currently under the influence of elevated 
solar winds associated with a coronal hole. Increased geomagnetic 
activity that occurred on 18-19 Jan (unsettled to active levels) 
is expected to cause HF depressions on 20 Jan in high latitudes, 
with the depressions likely extending to lower latitudes.

DEGRADED HF PROPAGATION CONDITIONS EXPECTED
FOR 20 JANUARY 2017
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
_____________________________________________________________
20 Jan:   -5   normal/-25%      2  4  6  8  8 12 16 16

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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