Apr. 2019 Yamagata-ken Yamagata-shi Expected value of LF field strength Transmitting Station: Hagane-yama LF station Latitude of receiver(Degree): 38.23 Longitude of receiver(Degree): 140.37 Distance from Hagane-yama LF station (km): 1058 Time(JST) Field Strength(mV/m) Field Strength(dB uV/m) 0:00 1.273 62.1 1:00 1.273 62.1 2:00 1.273 62.1 3:00 1.273 62.1 4:00 1.248 61.9 5:00 1.320 62.4 6:00 0.490 53.8 7:00 0.986 59.9 8:00 1.030 60.3 9:00 0.835 58.4 10:00 0.604 55.6 11:00 0.431 52.7 12:00 0.365 51.2 13:00 0.376 51.5 14:00 0.473 53.5 15:00 0.688 56.7 16:00 0.905 59.1 17:00 1.063 60.5 18:00 0.839 58.5 19:00 0.678 56.6 20:00 1.363 62.7 21:00 1.257 62.0 22:00 1.273 62.1 23:00 1.273 62.1