HF Communications Warning

(last updated 29 Sep 2016 15:15 UT)

SUBJ: SWS HF RADIO COMMUNICATIONS WARNING 16/42 ISSUED AT 0019UT/29 SEPTEMBER 2016 BY THE AUSTRALIAN SPACE FORECAST CENTRE. The geomagnetic conditions are expected to vary between active levels to major storms for the next three days. This is because the solar winds are expected to be in excess of 600 km/s associated with a very large positive polarity coronal hole. Strong HF depressions are expected in the mid and high latitude regions of both the hemispheres. Near monthly predicted HF conditions are expected in the equatorial regions. HF users are advised to selected lower than usual frequencies. DEGRADED HF PROPAGATION CONDITIONS EXPECTED FROM 29 SEPTEMBER 2016 TO 01 OCTOBER 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 _____________________________________________________________ 29 Sep: 0 -23% 2 4 6 8 8 12 16 16 30 Sep: 5 -20% 2 4 6 8 8 12 16 16 01 Oct: 3 -16% 2 4 6 8 12 12 16 22