horizontal electric and magnetic fields (Ex, Ey, Hx and Hy) were measured, where x is oriented north and y is oriented east. The electrodes (LEMI-701), broadband magnetic coils (LEMI-120) and the acquisition unit were left overnight to acquire the data for a total of about 20 h at each station (2 h of 1000 Hz sampling rate and 18 h of 250 Hz sampling rate). For the high frequency magnetic fields, the broadband coils LEMI-120 were replaced with the high frequency coils (LEMI-118) and data was acquired 30 min before or after the 20-h measurement using a sampling rate of 10,000 Hz. Both broadband and high frequency data were processed and combined to produce data ranging from 5000 Hz to around 1000 s. Most of the sites are less than 10 km from the main district of Mae Chan where its population is less than 20,000. Cultural noise from electric cables and