SWS GRAFEX HF FREQUENCY PREDICTIONS ADDRESS NO. 1234 =============================================================================== Circuit: Broome Perth Date: 13 February, 2026 T-index: 75 Bearings: 201 24 Distance: 1680 km First Mode |--------F r e q u e n c y (MHz)---------| Second Mode 1F 12-19 1E 2 1 5 10 15 20 25 30 35 40 2F 29-38 2E 10 UT OWF EMUF ALF |...|....| ....|....| ....|....| ....|....| OWF EMUF ALF UT 00 12.6 15.1 8.7 SSXXM BBPPP%... 7.7 10.0 5.1 00 01 13.8 16.5 9.4 ASXXX BBBPPP.... 8.0 10.9 5.5 01 02 14.6 17.4 9.8 ASSXX XBBBPPP... . 8.5 11.6 5.7 02 03 15.1 18.0 10.1 ASSSX XBBBBPPP.. ... 9.2 12.0 5.9 03 04 15.3 18.2 10.2 ASSSX XXBBBPPP.. ... 9.3 12.1 5.9 04 05 15.9 18.0 10.1 ASSSX XMBBBPPP%. .... 9.5 12.0 5.9 05 06 15.9 17.5 9.9 ASSSX XMBBBPP%%% ..... 9.7 11.7 5.7 06 07 15.4 16.6 9.4 ASSSX XMBBBP%%%. .... 9.5 11.2 5.5 07 08 14.7 15.3 8.8 SSSXX MMBBP%%%%. ... 9.2 10.2 5.1 08 09 13.9 13.2 7.8 ASSXMM MBB%%%%%.. .. 8.8 8.7 4.6 09 10 13.0 9.4 5.9 ASMMMMM MF%%%%%... .. 8.5 5.6 3.6 10 11 11.9 2.3 0.0 XMMMMMMMMM F%%%%%.... . 7.9 1.5 0.0 11 12 10.9 2.3 0.0 XMMMMMMMMF %%%%%.... 7.3 1.5 0.0 12 13 10.1 2.3 0.0 XMMMMMMMMF %%%%.... 6.8 1.5 0.0 13 14 9.4 2.3 0.0 XMMMMMMMF% %%.... 6.3 1.5 0.0 14 15 9.5 2.3 0.0 XMMMMMMMF% %%.... 6.3 1.5 0.0 15 16 9.7 2.3 0.0 XMMMMMMMF% %%.... 6.3 1.5 0.0 16 17 9.4 2.3 0.0 XMMMMMMMF% %%.... 6.2 1.5 0.0 17 18 8.0 2.3 0.0 XMMMMMM%%% %.... 6.0 1.5 0.0 18 19 6.9 2.3 0.0 XMMMMM%%%% .... 5.3 1.5 0.0 19 20 6.2 2.3 0.0 XMMMMM%%%. ... 4.9 1.5 0.0 20 21 5.8 2.3 0.0 XMMMMM%%.. .. 4.7 1.5 0.0 21 22 7.9 8.7 5.5 SSMMP%% %... 5.8 5.6 3.3 22 23 11.2 12.9 7.6 ASXXMB BP%%... 6.8 8.5 4.5 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) 13-Feb-2026 BoM Space Weather Services, Sydney Australia +61-2-9213-8000