SWS GRAFEX HF FREQUENCY PREDICTIONS ADDRESS NO. 1234 =============================================================================== Circuit: Kununurra Perth Date: 3 December, 2025 T-index: 115 Bearings: 214 39 Distance: 2219 km First Mode |--------F r e q u e n c y (MHz)---------| Second Mode 1F 8-15 1E 0 1 5 10 15 20 25 30 35 40 2F 22-34 2E 6 UT OWF EMUF ALF |...|....| ....|....| ....|....| ....|....| OWF EMUF ALF UT 00 17.2 0.0 11.5 ASSS XXXFFFF%%% .... 10.1 13.1 6.9 00 01 18.1 0.0 12.3 SSS XXXXFFFF%% %.... 10.6 14.2 7.3 01 02 18.9 0.0 12.7 ASS XXXXFFFF%% %%.... 11.0 14.9 7.6 02 03 19.4 0.0 13.0 ASS SXXXXFFFF% %%..... 11.3 15.3 7.7 03 04 20.1 0.0 13.1 ASS SXXXXFFFFF %%%..... 11.6 15.4 7.8 04 05 20.8 0.0 12.9 ASS SXXXXFFFFF %%%%..... 11.9 15.3 7.7 05 06 19.7 0.0 12.6 ASS SXXXFFFFF% %%%%.... 11.6 14.8 7.5 06 07 18.8 0.0 12.0 SSS SXXMFFFF%% %%%..... 11.3 13.9 7.2 07 08 18.0 0.0 11.2 ASSS XXMFFFF%%% %%..... 11.0 12.6 6.8 08 09 17.6 0.0 9.9 SSSX MMMFFFF%%% %%.... 11.1 10.5 6.2 09 10 16.8 0.0 7.5 SSMMM MMMFFF%%%% %..... 11.0 5.9 5.1 10 11 16.0 0.0 0.0 XXMMMMMMMM MMMFF%%%%% ..... 10.7 2.1 0.0 11 12 15.4 0.0 0.0 XXMMMMMMMM MMFFF%%%%. .... 10.2 2.1 0.0 12 13 15.2 0.0 0.0 XXMMMMMMMM MFFFF%%%%. .... 9.6 2.1 0.0 13 14 15.2 0.0 0.0 XXMMMMMMMM MFFFF%%%%. ... 9.3 2.1 0.0 14 15 15.4 0.0 0.0 XXMMMMMMMM MFFFF%%%%. .... 9.3 2.1 0.0 15 16 15.4 0.0 0.0 XXMMMMMMMM MFFFF%%%%. .... 9.2 2.1 0.0 16 17 14.0 0.0 0.0 XXMMMMMMMM FFF%%%%... .. 8.6 2.1 0.0 17 18 12.3 0.0 0.0 XXMMMMMMMM FF%%%%.... 7.9 2.1 0.0 18 19 11.5 0.0 0.0 XXMMMMMMMF F%%%%..... 7.3 2.1 0.0 19 20 10.9 0.0 0.0 XXMMMMMMMF %%%%.... 7.0 2.1 0.0 20 21 11.2 0.0 0.0 XXMMMMMMMF F%%%%.... 7.3 2.1 0.0 21 22 14.4 0.0 8.6 SSSMM MFFF%%%%.. .. 8.9 9.0 5.3 22 23 16.6 0.0 10.4 SSSX XMFFFF%%%. ... 9.8 11.6 6.3 23 UT OWF EMUF ALF |...|....| ....|....| ....|....| ....|....| OWF EMUF ALF UT =============================================================================== |. USABLE LESS THAN 50% OF DAYS |% USABLE 50% TO 90% OF DAYS | |B BOTH E and F MODES 90% OF DAYS |M MIXED FIRST AND SECOND F MODES | |F FIRST F MODE ONLY |E E-LAYER PROPAGATION |P 90% E and 50-90% F | |S SECOND MODES ONLY |A HIGH ABSORPTION |X COMPLEX MODES | (c) 3-Dec-2025 BoM Space Weather Services, Sydney Australia +61-2-9213-8000