SWS GRAFEX HF FREQUENCY PREDICTIONS ADDRESS NO. 1234 =============================================================================== Circuit: Kununurra Perth Date: 8 June, 2026 T-index: 85 Bearings: 214 39 Distance: 2219 km First Mode |--------F r e q u e n c y (MHz)---------| Second Mode 1F 7-9 1E 0 1 5 10 15 20 25 30 35 40 2F 21-24 2E 6 UT OWF EMUF ALF |...|....| ....|....| ....|....| ....|....| OWF EMUF ALF UT 00 21.2 0.0 9.2 ASSSM MMMMMFFFFF F%%%..... 13.2 9.7 5.8 00 01 22.9 0.0 10.2 SSSS XMMMMMMFFF FF%%%%.... . 14.7 11.6 6.3 01 02 23.1 0.0 10.9 ASSS XXMMMMMFFF FFF%%%%... .. 15.3 12.6 6.6 02 03 22.0 0.0 11.2 ASSS SXXMMMMFFF F%%%%%.... .. 14.7 13.2 6.8 03 04 21.5 0.0 11.3 ASSS SXXMMMMFFF F%%%%..... . 14.4 13.4 6.8 04 05 21.0 0.0 11.1 ASSS SXXMMMFFFF %%%%%..... 14.2 13.3 6.7 05 06 20.9 0.0 10.7 SSSS XXMMMMFFFF %%%%%..... . 14.0 12.7 6.4 06 07 21.2 0.0 9.9 ASSSX XMMMMMFFFF F%%%%..... .. 13.8 11.7 5.9 07 08 20.4 0.0 8.6 SSSXM MMMMMMFFFF %%%%...... . 13.5 9.8 5.1 08 09 18.2 0.0 4.8 SMMMMMM MMMMFFFF%% %%..... 12.3 3.4 3.2 09 10 14.5 0.0 0.0 XMMMMMMMMM MMFF%%%%.. .... 10.1 1.9 0.0 10 11 10.7 0.0 0.0 XMMMMMMMMF %%%%...... 7.7 1.9 0.0 11 12 9.1 0.0 0.0 XMMMMMMMF% %%..... 6.8 1.9 0.0 12 13 8.7 0.0 0.0 XMMMMMMF%% %..... 6.3 1.9 0.0 13 14 8.3 0.0 0.0 XMMMMMMF%% %.... 6.0 1.9 0.0 14 15 7.6 0.0 0.0 XMMMMMM%%% .... 5.6 1.9 0.0 15 16 7.5 0.0 0.0 XMMMMMM%%% .... 5.7 1.9 0.0 16 17 7.5 0.0 0.0 XMMMMMM%%% .... 5.8 1.9 0.0 17 18 7.3 0.0 0.0 XMMMMMM%%% .... 5.5 1.9 0.0 18 19 6.9 0.0 0.0 XMMMMMM%%% .... 5.1 1.9 0.0 19 20 6.5 0.0 0.0 XMMMMM%%%. ... 4.6 1.9 0.0 20 21 6.3 0.0 0.0 XMMMMM%%%. ... 4.8 1.9 0.0 21 22 8.8 0.0 0.0 XMMMMMMF%% %.... 5.8 1.9 0.0 22 23 16.4 0.0 6.9 ASMMMM MFFFFF%%%. .. 9.8 4.8 4.8 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-Jun-2026 BoM Space Weather Services, Sydney Australia +61-2-9213-8000