Apr. 2020 Tochigi-ken Utsunomiya-shi Expected value of LF field strength Transmitting Station: Hagane-yama LF station Latitude of receiver(Degree): 36.55 Longitude of receiver(Degree): 139.88 Distance from Hagane-yama LF station (km): 946 Time(JST) Field Strength(mV/m) Field Strength(dB uV/m) 0:00 0.791 58.0 1:00 0.791 58.0 2:00 0.791 58.0 3:00 0.791 58.0 4:00 0.750 57.5 5:00 1.384 62.8 6:00 0.876 58.9 7:00 0.681 56.7 8:00 1.128 61.0 9:00 1.111 60.9 10:00 0.932 59.4 11:00 0.762 57.6 12:00 0.690 56.8 13:00 0.704 56.9 14:00 0.807 58.1 15:00 1.014 60.1 16:00 1.141 61.1 17:00 1.057 60.5 18:00 0.413 52.3 19:00 1.333 62.5 20:00 1.118 61.0 21:00 0.766 57.7 22:00 0.791 58.0 23:00 0.791 58.0