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HomeHF SystemsAustralasiaHF ConditionsHF Communications Warning Saturday, Dec 10 2016 22:17 UT
Australasia

HF Communications Warning

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(last updated 10 Dec 2016 22:15 UT)

SUBJ: SWS HF RADIO COMMUNICATIONS WARNING 16/65 ISSUED AT 2354UT/07 DECEMBER 2016 BY THE AUSTRALIAN SPACE FORECAST CENTRE. The earth ionosphere is currently under the influence of disturbed solar winds associated with a large southern hemisphere coronal hole. The HF depressions are currently been experienced in the high latitude regions. Over the next four days (08-11 December), the high latitude depressions are expected to extend into the low latitude regions as the disturbed geomagnetic conditions persist. HF users are advised to use lower than the monthly predicted frequencies. DEGRADED HF PROPAGATION CONDITIONS EXPECTED FROM 08-11 DECEMBER 2016 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 _____________________________________________________________ 08 Dec: 0 normal/-15% 2 4 6 8 12 12 16 22 09 Dec: -10 -13% 2 4 6 8 12 12 16 22 10 Dec: -20 -17% 2 4 6 8 8 12 16 22 11 Dec: 10 normal/-15% 2 4 6 8 12 12 16 22

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