Acknowledgements
We thank Dr. Peter Shearer for sharing his ideas in the process of determining the SNSS method, and the USGS/HRSN personnel who collect and distribute Parkfield dataset online for public use (visit the USGS at https://usgs.gov for further details). Data for this study come from the High-Resolution Seismic Network (HRSN) doi:10.7932/HRSN, operated by the UC Berkeley Seismological Laboratory, which is archived at the Northern California Earthquake Data Center (NCEDC), doi:10.7932/NCEDC. Waveform data, metadata, or data products for this study were accessed through the Northern California Earthquake Data Center (NCEDC), doi:10.7932/NCEDC. Some of the computing for this project was performed at the OU Supercomputing Center for Education & Research (OSCER) at the University of Oklahoma (OU). This project is supported by National Science Foundation (NSF) under Awards 1547071 and 1547083. The dataset used for the analysis in this research can be obtained in the first author’s GitHub repository (https://doi.org/10.5281/zenodo.5129231).