SWS GRAFEX HF FREQUENCY PREDICTIONS ADDRESS NO. 1234 =============================================================================== Circuit: Kununurra Perth Date: 9 October, 2026 T-index: 40 Bearings: 214 39 Distance: 2219 km First Mode |--------F r e q u e n c y (MHz)---------| Second Mode 1F 7-11 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 16.9 0.0 9.8 ASSSX XMFFFF%%%% .... 10.5 11.4 5.9 00 01 17.5 0.0 10.5 SSSS XXFFFFF%%% %... 10.5 12.6 6.3 01 02 17.8 0.0 11.0 ASSS XXXFFFF%%% %.... 10.6 13.4 6.6 02 03 18.3 0.0 11.2 ASSS XXXFFFFF%% %%... 10.9 13.8 6.7 03 04 18.6 0.0 11.3 ASSS SXXMFFFF%% %%.... 11.2 13.9 6.7 04 05 18.3 0.0 11.2 ASSS SXXMFFFF%% %%... 11.5 13.8 6.6 05 06 17.3 0.0 10.8 ASSS XXXFFFF%%% %.... 11.0 13.4 6.5 06 07 16.7 0.0 10.3 SSSS XXMFFF%%%% .... 10.5 12.5 6.2 07 08 16.2 0.0 9.4 ASSSX XMFFFF%%%% .... 10.3 11.1 5.7 08 09 16.2 0.0 8.0 ASSXMM MMFFFF%%%% .... 10.4 8.7 5.0 09 10 13.8 0.0 2.2 MMMMMMMM MMF%%%%%.. .... 9.6 0.0 3.3 10 11 11.2 0.0 0.0 XMMMMMMMMM M%%%%%.... ... 8.1 1.7 0.0 11 12 9.9 0.0 0.0 XMMMMMMMM% %%%%...... 7.3 1.7 0.0 12 13 9.3 0.0 0.0 XMMMMMMMM% %%%%..... 6.7 1.7 0.0 13 14 9.3 0.0 0.0 XMMMMMMMF% %%%..... 6.5 1.7 0.0 14 15 9.7 0.0 0.0 XMMMMMMMF% %%%.... 6.6 1.7 0.0 15 16 9.3 0.0 0.0 XMMMMMMMF% %%..... 6.3 1.7 0.0 16 17 8.7 0.0 0.0 XMMMMMMF%% %..... 6.2 1.7 0.0 17 18 7.6 0.0 0.0 XMMMMMM%%% .... 5.7 1.7 0.0 18 19 6.7 0.0 0.0 XMMMMM%%%. .. 5.1 1.7 0.0 19 20 6.4 0.0 0.0 XMMMMM%%%. .. 5.1 1.7 0.0 20 21 7.5 0.0 0.0 XMMMMMM%%% .... 5.6 1.7 0.0 21 22 11.4 0.0 6.2 SSMMMF F%%%%.... 7.8 5.5 4.1 22 23 15.6 0.0 8.6 SSSXM MFFFF%%%%. .. 9.8 9.6 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) 9-Oct-2026 BoM Space Weather Services, Sydney Australia +61-2-9213-8000