SWS GRAFEX HF FREQUENCY PREDICTIONS ADDRESS NO. 1234 =============================================================================== Circuit: Kununurra Perth Date: 9 May, 2026 T-index: 70 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 21-24 2E 6 UT OWF EMUF ALF |...|....| ....|....| ....|....| ....|....| OWF EMUF ALF UT 00 20.8 0.0 9.3 ASSSX MMMMMFFFFF %%%%.... 13.2 10.2 5.8 00 01 22.7 0.0 10.3 SSSS XMMMMMMFFF FF%%%%.... . 14.4 11.8 6.3 01 02 22.7 0.0 10.9 ASSS XXMMMMMFFF FF%%%%%... .. 14.9 12.8 6.6 02 03 22.2 0.0 11.2 ASSS SXXMMMMFFF FF%%%%.... .. 14.8 13.3 6.8 03 04 21.8 0.0 11.2 ASSS SXXMMMMFFF F%%%%%.... .. 14.6 13.5 6.8 04 05 21.6 0.0 11.1 ASSS SXXMMMFFFF F%%%%%.... . 14.2 13.4 6.7 05 06 21.3 0.0 10.7 SSSS XXMMMMMFFF F%%%%%.... .. 14.3 12.9 6.4 06 07 21.2 0.0 10.0 ASSSX XMMMMMMFFF F%%%%%.... ... 14.0 11.9 5.9 07 08 20.6 0.0 8.8 SSSXX MMMMMMMFFF %%%%%..... .. 13.9 10.1 5.3 08 09 18.8 0.0 6.1 ASSMMMM MMMMMFFF%% %%%...... 12.7 5.8 3.9 09 10 14.7 0.0 0.0 XMMMMMMMMM MMMF%%%%%. ..... 10.5 1.8 0.0 10 11 11.6 0.0 0.0 XMMMMMMMMM F%%%%..... .. 8.3 1.8 0.0 11 12 9.9 0.0 0.0 XMMMMMMMM% %%%...... 7.2 1.8 0.0 12 13 9.1 0.0 0.0 XMMMMMMMF% %%...... 6.4 1.8 0.0 13 14 8.7 0.0 0.0 XMMMMMMM%% %%.... 6.2 1.8 0.0 14 15 8.3 0.0 0.0 XMMMMMMF%% %.... 6.0 1.8 0.0 15 16 8.3 0.0 0.0 XMMMMMMF%% %.... 6.1 1.8 0.0 16 17 8.0 0.0 0.0 XMMMMMM%%% %.... 6.0 1.8 0.0 17 18 7.7 0.0 0.0 XMMMMMM%%% %.... 5.7 1.8 0.0 18 19 7.2 0.0 0.0 XMMMMMM%%% ..... 5.0 1.8 0.0 19 20 6.6 0.0 0.0 XMMMMM%%%. .... 4.7 1.8 0.0 20 21 6.3 0.0 0.0 XMMMMM%%%. ... 4.9 1.8 0.0 21 22 9.2 0.0 0.0 XMMMMMMFF% %%... 5.9 1.8 0.0 22 23 17.3 0.0 7.4 ASSMMM MMFFFFF%%% .... 10.4 6.7 4.9 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-May-2026 BoM Space Weather Services, Sydney Australia +61-2-9213-8000