SWS GRAFEX HF FREQUENCY PREDICTIONS ADDRESS NO. 1234 =============================================================================== Circuit: Kununurra Perth Date: 9 November, 2025 T-index: 105 Bearings: 214 39 Distance: 2219 km First Mode |--------F r e q u e n c y (MHz)---------| Second Mode 1F 8-14 1E 0 1 5 10 15 20 25 30 35 40 2F 22-32 2E 6 UT OWF EMUF ALF |...|....| ....|....| ....|....| ....|....| OWF EMUF ALF UT 00 18.1 0.0 11.2 ASSS XXMFFFFF%% %.... 10.6 12.8 6.8 00 01 18.2 0.0 12.0 SSS XXXFFFFF%% %%... 10.8 13.9 7.2 01 02 18.9 0.0 12.5 ASS SXXXFFFF%% %%.... 11.2 14.7 7.5 02 03 20.5 0.0 12.7 ASS SXXXXFFFFF %%%..... 11.8 15.1 7.6 03 04 21.2 0.0 12.8 ASS SSXXXFFFFF F%%%..... 12.1 15.2 7.6 04 05 21.5 0.0 12.7 ASS SSXXXFFFFF F%%%%.... 12.3 15.1 7.5 05 06 20.4 0.0 12.3 SSS SSXXMFFFFF %%%%..... 12.2 14.7 7.4 06 07 19.2 0.0 11.8 SSS SXXMFFFFF% %%%..... 11.6 13.7 7.1 07 08 18.4 0.0 10.9 ASSS XXMMFFFF%% %%..... 11.2 12.3 6.6 08 09 18.6 0.0 9.5 ASSSX MMMMFFFF%% %%%.... 11.4 10.1 5.9 09 10 17.4 0.0 6.7 ASMMMM MMMMFFF%%% %%..... 11.3 0.0 4.7 10 11 16.0 0.0 0.0 XMMMMMMMMM MMMFF%%%%% %..... 11.0 2.0 0.0 11 12 14.8 0.0 0.0 XMMMMMMMMM MMFF%%%%%. .... 10.0 2.0 0.0 12 13 14.0 0.0 0.0 XMMMMMMMMM MFF%%%%%.. ... 9.2 2.0 0.0 13 14 14.0 0.0 0.0 XMMMMMMMMM MFF%%%%%.. ... 8.7 2.0 0.0 14 15 14.2 0.0 0.0 XMMMMMMMMM FFFF%%%%.. ... 8.6 2.0 0.0 15 16 14.2 0.0 0.0 XMMMMMMMMM FFFF%%%%.. ... 8.6 2.0 0.0 16 17 12.8 0.0 0.0 XMMMMMMMMM FF%%%%.... . 8.1 2.0 0.0 17 18 11.1 0.0 0.0 XMMMMMMMMF F%%%..... 7.5 2.0 0.0 18 19 10.1 0.0 0.0 XMMMMMMMFF %%%..... 7.0 2.0 0.0 19 20 10.1 0.0 0.0 XMMMMMMMFF %%%..... 6.8 2.0 0.0 20 21 10.7 0.0 0.0 XMMMMMMMMF %%%%..... 7.3 2.0 0.0 21 22 14.6 0.0 8.1 ASSSMM MFFF%%%%%. ... 9.1 8.2 5.0 22 23 17.4 0.0 10.1 SSSS XMFFFFF%%% %... 10.1 11.1 6.1 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-Nov-2025 BoM Space Weather Services, Sydney Australia +61-2-9213-8000