SWS GRAFEX HF FREQUENCY PREDICTIONS ADDRESS NO. 1234 =============================================================================== Circuit: Esperance Perth Date: 19 February, 2026 T-index: 95 Bearings: 289 112 Distance: 602 km First Mode |--------F r e q u e n c y (MHz)---------| Second Mode 1F 38-49 1E 15 1 5 10 15 20 25 30 35 40 2F 58-67 2E 30 UT OWF EMUF ALF |...|....| ....|....| ....|....| ....|....| OWF EMUF ALF UT 00 6.9 8.0 4.0 XMMMP.. 6.1 4.8 3.2 00 01 7.3 8.7 4.3 AXMMM%. . 6.5 5.3 3.5 01 02 7.8 9.2 4.5 AXMMMP. . 6.9 5.6 3.6 02 03 8.3 9.5 4.6 AXMMMM% .. 7.3 5.8 3.7 03 04 8.4 9.6 4.7 AXMMMM% .. 7.5 5.9 3.7 04 05 8.5 9.5 4.6 AXMMMM% .. 7.6 5.8 3.7 05 06 8.4 9.3 4.5 AXMMMM% .. 7.4 5.7 3.6 06 07 8.2 8.8 4.3 AXMMMM% .. 7.2 5.4 3.5 07 08 8.2 8.1 4.1 SMMMMM% .. 7.1 4.9 3.3 08 09 7.8 7.0 3.6 AXMMMM%% . 6.9 4.2 2.9 09 10 7.7 5.2 2.8 MMMMMM%. . 6.7 3.0 2.3 10 11 7.2 1.3 0.0 MMMMMMMM%. . 6.4 0.8 0.0 11 12 6.8 1.3 0.0 MMMMMMM%.. 6.0 0.8 0.0 12 13 6.2 1.3 0.0 MMMMMMM%. 5.6 0.8 0.0 13 14 5.6 1.3 0.0 MMMMMM%. 5.1 0.8 0.0 14 15 5.5 1.3 0.0 MMMMMM%. 5.0 0.8 0.0 15 16 5.4 1.3 0.0 MMMMMM.. 5.0 0.8 0.0 16 17 5.2 1.3 0.0 MMMMM%.. 4.7 0.8 0.0 17 18 4.8 1.3 0.0 MMMMM%. 4.4 0.8 0.0 18 19 4.5 1.3 0.0 MMMMM.. 4.1 0.8 0.0 19 20 4.2 1.3 0.0 MMMM%. 3.9 0.8 0.0 20 21 4.2 1.3 0.0 MMMM%. 3.9 0.8 0.0 21 22 5.0 4.7 2.6 MMM%. 4.4 2.6 2.2 22 23 6.1 6.8 3.5 AXMM%.. 5.4 4.1 2.9 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) 19-Feb-2026 BoM Space Weather Services, Sydney Australia +61-2-9213-8000