Aug. 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 0.960 59.6 4:00 0.919 59.3 5:00 1.654 64.4 6:00 0.943 59.5 7:00 0.899 59.1 8:00 1.305 62.3 9:00 1.243 61.9 10:00 1.015 60.1 11:00 0.830 58.4 12:00 0.748 57.5 13:00 0.763 57.7 14:00 0.881 58.9 15:00 1.096 60.8 16:00 1.291 62.2 17:00 1.246 61.9 18:00 0.648 56.2 19:00 1.277 62.1 20:00 1.384 62.8 21:00 0.936 59.4 22:00 0.969 59.7 23:00 0.969 59.7