SWS GRAFEX HF FREQUENCY PREDICTIONS ADDRESS NO. 1234 =============================================================================== Circuit: Kununurra Perth Date: 12 November, 2025 T-index: 50 Bearings: 214 39 Distance: 2219 km First Mode |--------F r e q u e n c y (MHz)---------| Second Mode 1F 7-12 1E 0 1 5 10 15 20 25 30 35 40 2F 22-30 2E 6 UT OWF EMUF ALF |...|....| ....|....| ....|....| ....|....| OWF EMUF ALF UT 00 15.5 0.0 10.2 SSSX XXFFF%%%.. .. 9.1 12.1 6.2 00 01 16.7 0.0 10.9 ASSX XXXFFF%%%. .. 9.3 13.1 6.5 01 02 17.5 0.0 11.3 ASSX XXXFFFF%%% .... 9.9 13.8 6.8 02 03 18.0 0.0 11.6 ASSS XXXXFFF%%% %...... 10.6 14.2 6.9 03 04 18.3 0.0 11.6 ASSS XXXXFFFF%% %%...... 11.0 14.3 6.9 04 05 18.8 0.0 11.5 ASSS SXXXFFFF%% %%%...... 11.2 14.2 6.9 05 06 18.4 0.0 11.2 ASSS SXXMFFFF%% %%%..... 11.2 13.8 6.7 06 07 17.5 0.0 10.7 SSSS XXMFFFF%%% %%..... 11.0 12.9 6.4 07 08 16.7 0.0 9.9 ASSSX XMMFFF%%%% %..... 10.6 11.6 6.0 08 09 16.6 0.0 8.7 SSSXM MMMFFF%%%% %..... 10.7 9.5 5.4 09 10 15.1 0.0 6.2 SSMMMM MMMFF%%%%% ..... 10.4 0.0 4.3 10 11 13.5 0.0 0.0 XMMMMMMMMM MMF%%%%%.. .... 9.4 1.7 0.0 11 12 12.2 0.0 0.0 XMMMMMMMMM MF%%%%%... .. 8.7 1.7 0.0 12 13 11.2 0.0 0.0 XMMMMMMMMM F%%%%..... 7.8 1.7 0.0 13 14 11.3 0.0 0.0 XMMMMMMMMF F%%%%.... 7.4 1.7 0.0 14 15 11.8 0.0 0.0 XMMMMMMMMF F%%%%.... 7.5 1.7 0.0 15 16 12.0 0.0 0.0 XMMMMMMMMF F%%%%..... 7.6 1.7 0.0 16 17 10.7 0.0 0.0 XMMMMMMMMF %%%%.... 7.1 1.7 0.0 17 18 9.3 0.0 0.0 XMMMMMMMF% %%.... 6.7 1.7 0.0 18 19 8.4 0.0 0.0 XMMMMMMF%% %..... 6.3 1.7 0.0 19 20 8.2 0.0 0.0 XMMMMMMF%% %..... 6.1 1.7 0.0 20 21 8.9 0.0 0.0 XMMMMMMM%% %%..... 6.6 1.7 0.0 21 22 12.2 0.0 7.4 ASSMMM FF%%%%.... . 8.2 7.8 4.6 22 23 14.1 0.0 9.2 ASSXX MFFF%%%%.. . 8.7 10.5 5.6 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) 12-Nov-2025 BoM Space Weather Services, Sydney Australia +61-2-9213-8000