SWS GRAFEX HF FREQUENCY PREDICTIONS ADDRESS NO. 1234 =============================================================================== Circuit: Kununurra Perth Date: 23 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 21-28 2E 6 UT OWF EMUF ALF |...|....| ....|....| ....|....| ....|....| OWF EMUF ALF UT 00 16.0 0.0 9.9 ASSSX XMFFF%%%%. ... 9.9 11.7 6.0 00 01 16.4 0.0 10.6 SSSX XXFFFF%%%% ... 9.9 12.8 6.4 01 02 17.2 0.0 11.1 ASSS XXXFFFF%%% .... 10.2 13.5 6.6 02 03 17.8 0.0 11.3 ASSS XXXFFFF%%% %%.... 10.7 13.9 6.8 03 04 18.4 0.0 11.4 ASSS SXXFFFFF%% %%.... 11.1 14.0 6.8 04 05 18.4 0.0 11.2 ASSS SXXMFFFF%% %%.... 11.3 13.9 6.7 05 06 17.6 0.0 10.9 ASSS XXXFFFF%%% %..... 11.1 13.5 6.5 06 07 17.0 0.0 10.4 SSSS XXMFFF%%%% %.... 10.7 12.6 6.2 07 08 16.4 0.0 9.6 ASSSX XMFFFF%%%% .... 10.4 11.3 5.8 08 09 16.5 0.0 8.2 SSSMM MMMFFF%%%% .... 10.5 9.0 5.1 09 10 14.3 0.0 5.0 AMMMMMM MMFF%%%%%. .... 10.0 0.0 3.8 10 11 12.1 0.0 0.0 XMMMMMMMMM MF%%%%%... .... 8.5 1.7 0.0 11 12 10.6 0.0 0.0 XMMMMMMMMM %%%%%..... . 7.8 1.7 0.0 12 13 10.0 0.0 0.0 XMMMMMMMM% %%%%...... 7.1 1.7 0.0 13 14 10.0 0.0 0.0 XMMMMMMMF% %%%%.... 6.8 1.7 0.0 14 15 10.5 0.0 0.0 XMMMMMMMFF %%%..... 6.9 1.7 0.0 15 16 10.2 0.0 0.0 XMMMMMMMFF %%%.... 6.7 1.7 0.0 16 17 9.4 0.0 0.0 XMMMMMMMF% %%.... 6.5 1.7 0.0 17 18 8.2 0.0 0.0 XMMMMMMF%% %.... 6.1 1.7 0.0 18 19 7.3 0.0 0.0 XMMMMMM%%% ... 5.6 1.7 0.0 19 20 7.0 0.0 0.0 XMMMMM%%%. ... 5.4 1.7 0.0 20 21 8.2 0.0 0.0 XMMMMMMF%% %.... 5.9 1.7 0.0 21 22 12.1 0.0 6.7 SSMMMM FF%%%..... 8.2 6.7 4.3 22 23 15.2 0.0 8.8 SSSXM MFFFF%%%.. .. 9.6 10.0 5.4 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) 23-Oct-2026 BoM Space Weather Services, Sydney Australia +61-2-9213-8000