Apr. 2023 Niigata-ken Niigata-shi Expected value of LF field strength Transmitting Station: Hagane-yama LF station Latitude of receiver(Degree): 37.90 Longitude of receiver(Degree): 139.02 Distance from Hagane-yama LF station (km): 936 Time(JST) Field Strength(mV/m) Field Strength(dB uV/m) 0:00 0.969 59.7 1:00 0.969 59.7 2:00 0.969 59.7 3:00 0.969 59.7 4:00 0.934 59.4 5:00 1.473 63.4 6:00 1.170 61.4 7:00 0.762 57.6 8:00 1.283 62.2 9:00 1.274 62.1 10:00 1.071 60.6 11:00 0.883 58.9 12:00 0.793 58.0 13:00 0.810 58.2 14:00 0.932 59.4 15:00 1.155 61.3 16:00 1.314 62.4 17:00 1.195 61.5 18:00 0.560 55.0 19:00 1.595 64.1 20:00 1.165 61.3 21:00 0.947 59.5 22:00 0.969 59.7 23:00 0.969 59.7