SWS GRAFEX HF FREQUENCY PREDICTIONS ADDRESS NO. 1234 =============================================================================== Circuit: Kununurra Perth Date: 16 July, 2026 T-index: 65 Bearings: 214 39 Distance: 2219 km First Mode |--------F r e q u e n c y (MHz)---------| Second Mode 1F 7-9 1E 0 1 5 10 15 20 25 30 35 40 2F 21-25 2E 6 UT OWF EMUF ALF |...|....| ....|....| ....|....| ....|....| OWF EMUF ALF UT 00 18.4 0.0 8.9 ASSXM MMMFFFFF%% %.... 11.6 9.7 5.6 00 01 19.6 0.0 10.0 SSSX XMMMFFFFF% %%%.... 12.6 11.4 6.1 01 02 19.3 0.0 10.6 SSSS XXMMMFFFF% %%%..... 12.8 12.4 6.4 02 03 18.6 0.0 10.9 ASSS XXMMMFFF%% %%%..... 12.7 13.0 6.6 03 04 17.3 0.0 11.0 ASSS XXXMFFF%%% %..... 12.2 13.2 6.6 04 05 17.3 0.0 10.8 ASSS XXMMFFF%%% %..... 11.9 13.0 6.5 05 06 16.9 0.0 10.4 SSSS XXMMFF%%%% %..... 11.6 12.5 6.2 06 07 16.8 0.0 9.6 ASSSX XMMMFF%%%% %...... 11.4 11.5 5.8 07 08 16.5 0.0 8.4 ASSSXM MMMMFF%%%% ...... 11.5 9.7 5.0 08 09 15.7 0.0 5.0 SMMMMMM MMMFF%%%%. ..... 10.9 4.2 3.3 09 10 12.1 0.0 0.0 XMMMMMMMMM FF%%%..... . 8.7 1.8 0.0 10 11 9.3 0.0 0.0 XMMMMMMMF% %%...... 6.8 1.8 0.0 11 12 8.3 0.0 0.0 XMMMMMMF%% %..... 6.1 1.8 0.0 12 13 7.7 0.0 0.0 XMMMMMM%%% ..... 5.7 1.8 0.0 13 14 7.3 0.0 0.0 XMMMMMF%%% .... 5.4 1.8 0.0 14 15 7.1 0.0 0.0 XMMMMMF%%. ... 5.4 1.8 0.0 15 16 7.0 0.0 0.0 XMMMMM%%%. ... 5.4 1.8 0.0 16 17 6.7 0.0 0.0 XMMMMM%%%. ... 5.4 1.8 0.0 17 18 6.3 0.0 0.0 XMMMMM%%%. ... 5.0 1.8 0.0 18 19 5.8 0.0 0.0 XMMMMM%%.. ... 4.4 1.8 0.0 19 20 5.3 0.0 0.0 XMMMM%%%.. . 3.9 1.8 0.0 20 21 5.4 0.0 0.0 XMMMM%%%.. .. 4.1 1.8 0.0 21 22 7.7 0.0 0.0 XMMMMMF%%% ... 5.3 1.8 0.0 22 23 14.1 0.0 6.9 ASMMMF FFFF%%.... 8.5 5.3 4.7 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) 16-Jul-2026 BoM Space Weather Services, Sydney Australia +61-2-9213-8000