SWS GRAFEX HF FREQUENCY PREDICTIONS ADDRESS NO. 1234 =============================================================================== Circuit: Esperance Perth Date: 12 February, 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 38-50 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 6.3 8.0 4.0 XMMMP.. 5.6 4.8 3.2 00 01 6.6 8.7 4.3 SXMMP.. 5.9 5.3 3.4 01 02 7.0 9.1 4.5 AXMMMP. . 6.3 5.6 3.6 02 03 7.6 9.4 4.6 AXMMMP. . 6.7 5.8 3.7 03 04 7.8 9.5 4.6 AXMMMP. . 6.9 5.8 3.7 04 05 7.8 9.5 4.6 AXMMMP. .. 7.0 5.8 3.7 05 06 7.8 9.2 4.5 AXMMMP% .. 6.9 5.6 3.6 06 07 7.6 8.8 4.3 AXMMM%. .. 6.7 5.3 3.5 07 08 7.6 8.1 4.0 XMMMM%. . 6.7 4.9 3.2 08 09 7.3 7.1 3.6 AXMMMM%. . 6.4 4.3 2.9 09 10 7.1 5.4 2.9 XMMMMM%. . 6.3 3.2 2.4 10 11 6.7 1.2 0.0 MMMMMMM%.. 6.0 0.7 0.0 11 12 6.4 1.2 0.0 MMMMMMM%.. 5.7 0.7 0.0 12 13 5.9 1.2 0.0 MMMMMMM.. 5.3 0.7 0.0 13 14 5.4 1.2 0.0 MMMMMM%. 5.0 0.7 0.0 14 15 5.3 1.2 0.0 MMMMMM.. 4.9 0.7 0.0 15 16 5.2 1.2 0.0 MMMMMM.. 4.8 0.7 0.0 16 17 5.0 1.2 0.0 MMMMM%. 4.5 0.7 0.0 17 18 4.7 1.2 0.0 MMMMM.. 4.3 0.7 0.0 18 19 4.5 1.2 0.0 MMMM%.. 4.0 0.7 0.0 19 20 4.2 1.2 0.0 MMMM%. 3.9 0.7 0.0 20 21 4.1 1.2 0.0 MMMM%. 3.8 0.7 0.0 21 22 4.9 5.0 2.7 MMM%.. 4.4 2.9 2.3 22 23 5.6 6.9 3.5 AXMM%.. 5.0 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) 12-Feb-2026 BoM Space Weather Services, Sydney Australia +61-2-9213-8000