SWS GRAFEX HF FREQUENCY PREDICTIONS ADDRESS NO. 1234 =============================================================================== Circuit: Kununurra Perth Date: 30 August, 2026 T-index: 95 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 21-26 2E 6 UT OWF EMUF ALF |...|....| ....|....| ....|....| ....|....| OWF EMUF ALF UT 00 21.7 0.0 10.2 SSSS XMMMMFFFFF F%%%%.... 13.6 11.2 6.3 00 01 23.4 0.0 11.1 ASSS SXMMMMMFFF FFF%%%%... . 14.5 12.7 6.8 01 02 23.3 0.0 11.7 SSS SXXMMMFFFF FFF%%%%... . 14.4 13.7 7.1 02 03 23.1 0.0 12.0 SSS SXXXMMFFFF FFF%%%.... . 14.5 14.2 7.2 03 04 22.4 0.0 12.1 SSS SSXXMMFFFF FF%%%..... 14.4 14.3 7.2 04 05 21.8 0.0 11.9 SSS SXXXMMFFFF F%%%%.... 14.2 14.2 7.1 05 06 20.9 0.0 11.5 ASSS SXXMMMFFFF %%%%.... 13.7 13.7 6.9 06 07 20.3 0.0 10.8 ASSS XXMMMFFFFF %%%%.... 13.3 12.8 6.5 07 08 20.3 0.0 9.7 ASSSX MMMMMFFFFF %%%%.... 13.2 11.0 5.8 08 09 20.2 0.0 7.5 ASSMMM MMMMMFFFFF %%%..... 13.0 7.6 4.7 09 10 17.1 0.0 0.0 XMMMMMMMMM MMMMFFF%%% %...... 11.5 2.0 0.0 10 11 13.4 0.0 0.0 XMMMMMMMMM MFF%%%%... ... 9.4 2.0 0.0 11 12 11.9 0.0 0.0 XMMMMMMMMM F%%%%..... . 8.4 2.0 0.0 12 13 11.2 0.0 0.0 XMMMMMMMMF F%%%...... 7.7 2.0 0.0 13 14 10.7 0.0 0.0 XMMMMMMMMF %%%%..... 7.4 2.0 0.0 14 15 10.5 0.0 0.0 XMMMMMMMFF %%%%..... 7.0 2.0 0.0 15 16 9.9 0.0 0.0 XMMMMMMMF% %%%..... 6.7 2.0 0.0 16 17 9.3 0.0 0.0 XMMMMMMMF% %%..... 6.5 2.0 0.0 17 18 8.4 0.0 0.0 XMMMMMMF%% %..... 6.2 2.0 0.0 18 19 7.7 0.0 0.0 XMMMMMM%%% %.... 5.5 2.0 0.0 19 20 6.9 0.0 0.0 XMMMMM%%%. ... 5.0 2.0 0.0 20 21 6.8 0.0 0.0 XMMMMMM%%. ... 5.3 2.0 0.0 21 22 10.2 0.0 0.0 MMMMMMMMFF %%%... 6.6 0.0 3.3 22 23 18.4 0.0 8.5 SSSMM MMMFFFFF%% %... 11.3 8.5 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) 30-Aug-2026 BoM Space Weather Services, Sydney Australia +61-2-9213-8000