*5.1. The Applicability of This Method in Other Passive Seismic Datasets*

Due to differences in collection environment and conditions, there are often great differences between different passive seismic datasets. Therefore, in addition to testing the passive seismic dataset in Sichuan, we also attempted to apply this method to a passive seismic dataset acquired in Inner Mongolia [37] to enhance the surface waves but did not achieve very obvious results. As the survey line arranged in the research area of Inner Mongolia was located near a village, and it was the busy farming season, when farmers used agricultural machinery to harvest corn in the field, the human activities were complex and the interference was serious, so this method might not be able to completely eliminate these complex noises. However, the study area in this paper is far away from the village, with little human interference, and only the mining activities about 4 km northwest of the survey line are prominent. Therefore, although this method had a good effect in processing the Sichuan dataset, it may not have obvious effects on the datasets collected in different environments (especially in areas where human activities are prominent).
