High-Speed Railways Interference Signal Characteristics and Multiple Remote References Denoising of Magnetotelluric Data in Jizhong Depression, China

In the economically developed Beijing–Tianjin–Hebei region, magnetotelluric data are susceptible to contamination from cultural noise, which can be caused, for example, by urban stray currents, high-speed railways, or high-voltage lines. The multiple remote references method is an effective tool that used suppress interference and improve signal-to-noise ratios. Therefore, this paper first introduces basic principles of then takes railway noise as example. characteristics time domain frequency signals analyzed. Then, we use two reference stations (with a single references) process interfering with compare results. Finally, entire section. Coupled known geological seismic data, inversion results well-reflect deep underground structure.