SWS GRAFEX HF FREQUENCY PREDICTIONS ADDRESS NO. 1234 =============================================================================== Circuit: Kununurra Perth Date: 8 February, 2026 T-index: 110 Bearings: 214 39 Distance: 2219 km First Mode |--------F r e q u e n c y (MHz)---------| Second Mode 1F 7-13 1E 0 1 5 10 15 20 25 30 35 40 2F 22-31 2E 6 UT OWF EMUF ALF |...|....| ....|....| ....|....| ....|....| OWF EMUF ALF UT 00 17.0 0.0 11.3 ASSS XXFFFF%%%% .... 10.3 12.8 6.8 00 01 18.0 0.0 12.1 SSS XXXFFFF%%% %..... 10.7 14.0 7.3 01 02 18.8 0.0 12.6 ASS SXXXFFFF%% %%.... 11.1 14.7 7.5 02 03 20.2 0.0 12.8 ASS SXXXXFFFFF %%%..... 11.6 15.1 7.7 03 04 20.5 0.0 12.9 ASS SXXXXFFFFF %%%%.... 11.7 15.3 7.7 04 05 21.0 0.0 12.8 ASS SXXXXFFFFF %%%%..... 11.9 15.2 7.6 05 06 20.6 0.0 12.4 SSS SSXXMFFFFF %%%%%..... 12.1 14.7 7.4 06 07 19.7 0.0 11.8 SSS SXXMMFFFF% %%%%...... 11.8 13.8 7.1 07 08 18.6 0.0 10.9 ASSS XXMMFFFF%% %%%..... 11.4 12.3 6.6 08 09 17.8 0.0 9.5 ASSSX MMMMFFF%%% %%..... 11.0 10.1 5.9 09 10 17.1 0.0 6.5 ASMMMM MMMFFFF%%% %..... 11.0 0.0 4.6 10 11 15.9 0.0 0.0 XMMMMMMMMM MMMFF%%%%% ..... 10.7 2.0 0.0 11 12 15.0 0.0 0.0 XMMMMMMMMM MMFF%%%%%. .... 9.9 2.0 0.0 12 13 14.3 0.0 0.0 XMMMMMMMMM MFFF%%%%.. ... 9.5 2.0 0.0 13 14 13.7 0.0 0.0 XMMMMMMMMM FFF%%%%... . 8.7 2.0 0.0 14 15 13.9 0.0 0.0 XMMMMMMMMM FFF%%%%... .. 8.6 2.0 0.0 15 16 13.9 0.0 0.0 XMMMMMMMMM FFF%%%%... .. 8.6 2.0 0.0 16 17 13.2 0.0 0.0 XMMMMMMMMM FFF%%%.... 8.4 2.0 0.0 17 18 11.4 0.0 0.0 XMMMMMMMMF F%%%%.... 7.7 2.0 0.0 18 19 10.3 0.0 0.0 XMMMMMMMMF %%%%.... 7.1 2.0 0.0 19 20 9.1 0.0 0.0 XMMMMMMMF% %%.... 6.5 2.0 0.0 20 21 9.2 0.0 0.0 XMMMMMMFF% %%.... 6.2 2.0 0.0 21 22 12.2 0.0 8.0 ASSMMF FF%%%.... 7.8 8.0 5.0 22 23 15.9 0.0 10.1 SSSX XFFFF%%%%. ... 9.5 11.1 6.2 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) 8-Feb-2026 BoM Space Weather Services, Sydney Australia +61-2-9213-8000