SWS GRAFEX HF FREQUENCY PREDICTIONS ADDRESS NO. 1234 =============================================================================== Circuit: Esperance Perth Date: 15 March, 2026 T-index: 85 Bearings: 289 112 Distance: 602 km First Mode |--------F r e q u e n c y (MHz)---------| Second Mode 1F 38-47 1E 15 1 5 10 15 20 25 30 35 40 2F 58-65 2E 30 UT OWF EMUF ALF |...|....| ....|....| ....|....| ....|....| OWF EMUF ALF UT 00 7.9 7.5 3.8 AXMMMM%. . 6.7 4.6 3.0 00 01 8.4 8.4 4.1 SXMMM%% . 7.4 5.1 3.3 01 02 8.8 8.9 4.3 AXMMMM% .. 7.7 5.4 3.5 02 03 9.2 9.2 4.4 AXMMMM% %. 8.1 5.6 3.6 03 04 9.5 9.3 4.5 AXMMMM% %.. 8.2 5.7 3.6 04 05 9.7 9.2 4.5 AXMMMMM %.. 8.5 5.6 3.6 05 06 9.6 9.0 4.3 AXMMMMM %.. 8.3 5.5 3.5 06 07 9.2 8.5 4.1 SXMMMMM %.. 8.0 5.1 3.3 07 08 8.9 7.7 3.8 XMMMMM% %. 7.8 4.6 3.1 08 09 8.6 6.4 3.3 AMMMMMM% .. 7.5 3.8 2.7 09 10 7.9 3.6 2.0 AMMMMMM%% .. 6.9 0.0 1.8 10 11 6.9 1.2 0.0 MMMMMMMM%. . 6.1 0.7 0.0 11 12 6.1 1.2 0.0 MMMMMMM%.. 5.4 0.7 0.0 12 13 5.4 1.2 0.0 MMMMMM%.. 4.9 0.7 0.0 13 14 5.1 1.2 0.0 MMMMMM.. 4.6 0.7 0.0 14 15 5.0 1.2 0.0 MMMMM%.. 4.6 0.7 0.0 15 16 4.9 1.2 0.0 MMMMM%.. 4.5 0.7 0.0 16 17 4.7 1.2 0.0 MMMMM%. 4.3 0.7 0.0 17 18 4.5 1.2 0.0 MMMMM.. 4.1 0.7 0.0 18 19 4.3 1.2 0.0 MMMMM.. 3.9 0.7 0.0 19 20 4.0 1.2 0.0 MMMM%. 3.8 0.7 0.0 20 21 3.9 1.2 0.0 MMMM%. 3.7 0.7 0.0 21 22 4.8 1.7 1.0 MMMMM%. 4.3 0.0 1.5 22 23 6.8 6.2 3.2 AMMMM%. 5.8 3.7 2.6 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) 15-Mar-2026 BoM Space Weather Services, Sydney Australia +61-2-9213-8000