SWS GRAFEX HF FREQUENCY PREDICTIONS ADDRESS NO. 1234 =============================================================================== Circuit: Busselton Perth Date: 13 February, 2026 T-index: 75 Bearings: 15 195 Distance: 196 km First Mode |--------F r e q u e n c y (MHz)---------| Second Mode 1F/1E: Near 90 1 5 10 15 20 25 30 35 40 ** NONE ** UT OWF EMUF ALF |...|....| ....|....| ....|....| ....|....| OWF EMUF ALF UT 00 5.1 3.8 2.9 AFF%.. 00 01 5.4 4.2 3.1 BF%%. 01 02 5.9 4.5 3.3 BF%%.. 02 03 6.3 4.6 3.4 BFF%.. 03 04 6.5 4.7 3.4 BFF%%. 04 05 6.6 4.7 3.4 BFF%%.. 05 06 6.6 4.6 3.4 BFF%%.. 06 07 6.5 4.4 3.2 BFF%%.. 07 08 6.4 4.1 3.0 ABFF%%. 08 09 6.2 3.6 2.8 AFFF%%. 09 10 5.9 2.9 2.3 FFF%%.. 10 11 5.6 0.6 0.0 FFFFF%%. 11 12 5.3 0.6 0.0 FFFFF%%. 12 13 4.9 0.6 0.0 FFFF%%. 13 14 4.5 0.6 0.0 FFFF%%. 14 15 4.5 0.6 0.0 FFFF%.. 15 16 4.4 0.6 0.0 FFFF%. 16 17 4.2 0.6 0.0 FFFF%. 17 18 4.1 0.6 0.0 FFFF%. 18 19 3.9 0.6 0.0 FFF%.. 19 20 3.6 0.6 0.0 FFF%. 20 21 3.6 0.6 0.0 FFF%. 21 22 4.0 2.0 1.7 AF%%. 22 23 4.5 3.2 2.5 AF%%. 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) 13-Feb-2026 BoM Space Weather Services, Sydney Australia +61-2-9213-8000