SWS GRAFEX HF FREQUENCY PREDICTIONS ADDRESS NO. 1234 =============================================================================== Circuit: Kununurra Perth Date: 2 October, 2026 T-index: 50 Bearings: 214 39 Distance: 2219 km First Mode |--------F r e q u e n c y (MHz)---------| Second Mode 1F 7-10 1E 0 1 5 10 15 20 25 30 35 40 2F 21-27 2E 6 UT OWF EMUF ALF |...|....| ....|....| ....|....| ....|....| OWF EMUF ALF UT 00 18.0 0.0 9.9 ASSSX XMMFFFF%%% %.... 11.1 11.5 6.0 00 01 18.7 0.0 10.7 SSSS XXMFFFFF%% %%.... 11.2 12.7 6.4 01 02 19.0 0.0 11.1 ASSS SXXFFFFF%% %%.... 11.2 13.5 6.7 02 03 19.1 0.0 11.4 ASSS SXXMFFFFF% %%.... 11.5 13.9 6.8 03 04 19.3 0.0 11.5 ASSS SXXXFFFFF% %%%.... 11.8 14.1 6.8 04 05 19.0 0.0 11.3 ASSS SXXMFFFF%% %%.... 11.9 13.9 6.7 05 06 18.0 0.0 11.0 ASSS XXXMFFF%%% %.... 11.4 13.5 6.5 06 07 17.2 0.0 10.4 SSSS XXMFFFF%%% %.... 10.9 12.6 6.2 07 08 16.8 0.0 9.5 ASSSX XMMFFF%%%% .... 10.7 11.1 5.8 08 09 16.7 0.0 8.0 ASSXMM MMMFFF%%%% .... 10.7 8.6 5.0 09 10 14.0 0.0 0.0 MMMMMMMMMM MMF%%%%%%. .... 9.8 0.0 3.0 10 11 11.4 0.0 0.0 XMMMMMMMMM M%%%%%%... ... 8.2 1.7 0.0 11 12 10.1 0.0 0.0 XMMMMMMMMM %%%%%..... . 7.5 1.7 0.0 12 13 9.6 0.0 0.0 XMMMMMMMM% %%%%...... 6.9 1.7 0.0 13 14 9.6 0.0 0.0 XMMMMMMMF% %%%...... 6.7 1.7 0.0 14 15 10.0 0.0 0.0 XMMMMMMMF% %%%..... 6.7 1.7 0.0 15 16 9.6 0.0 0.0 XMMMMMMMF% %%..... 6.5 1.7 0.0 16 17 9.0 0.0 0.0 XMMMMMMM%% %%.... 6.3 1.7 0.0 17 18 7.8 0.0 0.0 XMMMMMM%%% .... 5.9 1.7 0.0 18 19 6.9 0.0 0.0 XMMMMM%%%. ... 5.1 1.7 0.0 19 20 6.5 0.0 0.0 XMMMMM%%%. .. 5.0 1.7 0.0 20 21 7.5 0.0 0.0 XMMMMMM%%% .... 5.5 1.7 0.0 21 22 11.5 0.0 5.9 ASMMMMF F%%%.... 7.6 4.5 4.0 22 23 16.3 0.0 8.6 SSSXM MMFFFF%%%. .. 10.1 9.5 5.3 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) 2-Oct-2026 BoM Space Weather Services, Sydney Australia +61-2-9213-8000