SWS GRAFEX HF FREQUENCY PREDICTIONS ADDRESS NO. 1234 =============================================================================== Circuit: Esperance Perth Date: 25 June, 2026 T-index: 75 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 57-60 2E 30 UT OWF EMUF ALF |...|....| ....|....| ....|....| ....|....| OWF EMUF ALF UT 00 7.5 5.7 2.9 XMMMM%.. 6.2 3.4 2.3 00 01 8.6 7.1 3.4 AXMMMM%% . 7.2 4.3 2.8 01 02 9.1 7.8 3.7 AXMMMMF% .. 7.6 4.8 3.0 02 03 9.2 8.2 3.9 XMMMMM% ... 7.8 5.0 3.1 03 04 9.2 8.3 4.0 XXMMMM% ... 7.8 5.1 3.2 04 05 9.2 8.2 3.9 XMMMMM% ... 7.9 5.0 3.1 05 06 9.3 7.9 3.8 AXMMMMM% ... 7.9 4.8 3.0 06 07 9.3 7.2 3.5 AXMMMMM% ... 7.9 4.3 2.8 07 08 9.1 6.0 3.0 AMMMMMM% .. 7.6 3.5 2.5 08 09 8.1 1.2 0.0 MMMMMMMF%. . 6.8 0.0 1.4 09 10 6.0 1.2 0.0 MMMMMM%.. 5.1 0.7 0.0 10 11 4.5 1.2 0.0 MMMMM.. 3.9 0.7 0.0 11 12 3.9 1.2 0.0 MMMM%. 3.5 0.7 0.0 12 13 3.6 1.2 0.0 MMMM.. 3.4 0.7 0.0 13 14 3.4 1.2 0.0 MMMM.. 3.2 0.7 0.0 14 15 3.4 1.2 0.0 MMMM. 3.2 0.7 0.0 15 16 3.4 1.2 0.0 MMMM.. 3.2 0.7 0.0 16 17 3.4 1.2 0.0 MMMM.. 3.2 0.7 0.0 17 18 3.5 1.2 0.0 MMMM.. 3.2 0.7 0.0 18 19 3.5 1.2 0.0 MMMM.. 3.3 0.7 0.0 19 20 3.6 1.2 0.0 MMMM.. 3.3 0.7 0.0 20 21 3.3 1.2 0.0 MMMM.. 3.1 0.7 0.0 21 22 3.3 1.2 0.0 MMM%. 3.1 0.7 0.0 22 23 5.0 1.2 0.0 MMMMM.. 4.3 0.7 0.0 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) 25-Jun-2026 BoM Space Weather Services, Sydney Australia +61-2-9213-8000