SWS GRAFEX HF FREQUENCY PREDICTIONS ADDRESS NO. 1234 =============================================================================== Circuit: Kununurra Perth Date: 19 November, 2025 T-index: 115 Bearings: 214 39 Distance: 2219 km First Mode |--------F r e q u e n c y (MHz)---------| Second Mode 1F 8-15 1E 0 1 5 10 15 20 25 30 35 40 2F 22-33 2E 6 UT OWF EMUF ALF |...|....| ....|....| ....|....| ....|....| OWF EMUF ALF UT 00 17.8 0.0 11.5 ASSS XXFFFFF%%% %.... 10.5 13.0 6.9 00 01 18.0 0.0 12.2 SSS XXXXFFF%%% %.... 10.7 14.1 7.3 01 02 18.9 0.0 12.7 ASS SXXXFFFF%% %%.... 11.2 14.9 7.6 02 03 19.7 0.0 13.0 ASS SXXXXFFFF% %%%.... 11.6 15.3 7.7 03 04 20.5 0.0 13.0 ASS SXXXXFFFFF %%%%.... 11.9 15.4 7.8 04 05 21.0 0.0 12.9 ASS SSXXXFFFFF %%%%..... 12.1 15.3 7.7 05 06 20.1 0.0 12.6 ASS SXXXMFFFFF %%%%..... 12.0 14.8 7.5 06 07 18.8 0.0 12.0 SSS SXXMFFFF%% %%%..... 11.5 13.9 7.2 07 08 18.0 0.0 11.1 ASSS SXMMFFF%%% %%..... 11.1 12.5 6.8 08 09 18.1 0.0 9.8 SSSX MMMMFFFF%% %%..... 11.2 10.4 6.1 09 10 17.3 0.0 7.2 ASSMMM MMMMFFF%%% %%.... 11.3 5.0 4.9 10 11 16.5 0.0 0.0 XXMMMMMMMM MMMFFF%%%% %.... 11.1 2.1 0.0 11 12 15.4 0.0 0.0 XXMMMMMMMM MMFFF%%%%. .... 10.2 2.1 0.0 12 13 14.7 0.0 0.0 XXMMMMMMMM MFFF%%%%.. ... 9.5 2.1 0.0 13 14 14.5 0.0 0.0 XXMMMMMMMM MFFF%%%%.. .. 9.0 2.1 0.0 14 15 14.8 0.0 0.0 XXMMMMMMMM MFFF%%%%.. ... 9.0 2.1 0.0 15 16 15.0 0.0 0.0 XXMMMMMMMM MFFF%%%%%. ... 9.1 2.1 0.0 16 17 13.5 0.0 0.0 XXMMMMMMMM FFF%%%%... . 8.5 2.1 0.0 17 18 11.9 0.0 0.0 XXMMMMMMMF F%%%%.... 7.7 2.1 0.0 18 19 11.0 0.0 0.0 XXMMMMMMMF %%%%..... 7.1 2.1 0.0 19 20 10.9 0.0 0.0 XXMMMMMMFF %%%%.... 6.9 2.1 0.0 20 21 11.3 0.0 0.0 XXMMMMMMMF F%%%%.... 7.3 2.1 0.0 21 22 14.8 0.0 8.4 SSSMM MFFF%%%%%. ... 9.1 8.7 5.2 22 23 17.3 0.0 10.4 SSSX XMFFFFF%%% .... 10.0 11.4 6.3 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) 19-Nov-2025 BoM Space Weather Services, Sydney Australia +61-2-9213-8000