SWS GRAFEX HF FREQUENCY PREDICTIONS ADDRESS NO. 1234 =============================================================================== Circuit: Esperance Perth Date: 28 May, 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 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 8.5 6.0 3.0 AMMMMM%. . 7.0 3.6 2.5 00 01 9.7 7.3 3.6 AXMMMMM% %.. 8.1 4.4 2.9 01 02 10.4 8.0 3.9 XMMMMMM %%.. 8.7 4.9 3.1 02 03 10.5 8.4 4.0 XXMMMMM %%.. 8.8 5.2 3.2 03 04 10.2 8.5 4.1 SXMMMMM %.. 8.6 5.2 3.3 04 05 10.2 8.4 4.0 XXMMMMM %.. 8.8 5.1 3.2 05 06 10.4 8.1 3.9 XMMMMMM %%.. 8.9 4.9 3.1 06 07 10.5 7.4 3.6 AXMMMMMM %%.. 8.9 4.5 2.9 07 08 10.2 6.2 3.1 AMMMMMMF %... 8.5 3.7 2.6 08 09 9.2 3.1 1.7 AMMMMMMM% .. 7.7 0.0 1.7 09 10 7.1 1.2 0.0 MMMMMMM%.. 6.0 0.7 0.0 10 11 5.3 1.2 0.0 MMMMM%.. 4.7 0.7 0.0 11 12 4.5 1.2 0.0 MMMMM.. 4.1 0.7 0.0 12 13 4.0 1.2 0.0 MMMM%. 3.7 0.7 0.0 13 14 3.9 1.2 0.0 MMMM.. 3.6 0.7 0.0 14 15 3.8 1.2 0.0 MMMM.. 3.5 0.7 0.0 15 16 3.8 1.2 0.0 MMMM.. 3.5 0.7 0.0 16 17 3.8 1.2 0.0 MMMM.. 3.5 0.7 0.0 17 18 3.7 1.2 0.0 MMMM.. 3.4 0.7 0.0 18 19 3.7 1.2 0.0 MMMM.. 3.5 0.7 0.0 19 20 3.7 1.2 0.0 MMMM.. 3.5 0.7 0.0 20 21 3.4 1.2 0.0 MMMM.. 3.2 0.7 0.0 21 22 3.6 1.2 0.0 MMMM. 3.3 0.7 0.0 22 23 5.9 1.2 0.0 MMMMM%.. 5.0 0.0 1.0 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) 28-May-2026 BoM Space Weather Services, Sydney Australia +61-2-9213-8000