SWS GRAFEX HF FREQUENCY PREDICTIONS ADDRESS NO. 1234 =============================================================================== Circuit: Esperance Perth Date: 16 July, 2026 T-index: 65 Bearings: 289 112 Distance: 602 km First Mode |--------F r e q u e n c y (MHz)---------| Second Mode 1F 37-41 1E 15 1 5 10 15 20 25 30 35 40 2F 57-61 2E 30 UT OWF EMUF ALF |...|....| ....|....| ....|....| ....|....| OWF EMUF ALF UT 00 7.0 5.8 2.9 XMMM%%. 5.8 3.5 2.4 00 01 8.1 7.1 3.4 AXMMMF%. . 6.7 4.3 2.8 01 02 8.3 7.8 3.7 AXMMMM%. . 6.9 4.8 3.0 02 03 8.4 8.2 3.9 XMMMM%% .. 7.1 5.0 3.1 03 04 8.5 8.3 3.9 XXMMM%% .. 7.2 5.1 3.2 04 05 8.4 8.2 3.9 XMMMM%% .. 7.2 5.0 3.1 05 06 8.5 7.9 3.8 AXMMMM%% . 7.2 4.8 3.0 06 07 8.6 7.2 3.5 AXMMMM%% . 7.3 4.4 2.8 07 08 8.5 6.1 3.0 AMMMMM%% . 7.2 3.6 2.5 08 09 7.5 2.9 1.6 AMMMMM%.. 6.3 0.0 1.6 09 10 5.7 1.2 0.0 MMMMMM%.. 4.9 0.7 0.0 10 11 4.3 1.2 0.0 MMMM%.. 3.8 0.7 0.0 11 12 3.8 1.2 0.0 MMMM.. 3.5 0.7 0.0 12 13 3.5 1.2 0.0 MMMM.. 3.2 0.7 0.0 13 14 3.3 1.2 0.0 MMMM. 3.1 0.7 0.0 14 15 3.4 1.2 0.0 MMMM. 3.1 0.7 0.0 15 16 3.4 1.2 0.0 MMMM. 3.1 0.7 0.0 16 17 3.4 1.2 0.0 MMMM. 3.2 0.7 0.0 17 18 3.3 1.2 0.0 MMMM. 3.1 0.7 0.0 18 19 3.3 1.2 0.0 MMMM.. 3.1 0.7 0.0 19 20 3.3 1.2 0.0 MMMM.. 3.1 0.7 0.0 20 21 3.2 1.2 0.0 MMM%. 3.0 0.7 0.0 21 22 3.2 1.2 0.0 MMM%. 3.0 0.7 0.0 22 23 4.9 1.2 0.0 MMMMM. 4.2 0.0 0.9 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) 16-Jul-2026 BoM Space Weather Services, Sydney Australia +61-2-9213-8000