Research on Very Low Frequency Earthquakes before the Jishishan Ms6.2 Earthquake Using Envelope Cross-Correlation Localization Method
Utilizing the envelope cross-correlation method,we localize the very low frequency earth-quakes(VLFEs)before the Jishishan Ms6.2 earthquake.We conduct preliminary localization over a larger area,followed by precise localization within a smaller area.Analysis by increasing or decreasing the number of stations in different directions from the epicenter reveals that an even distribution of stations in all directions is crucial,effectively reducing localization errors.The localization results in-dicate that the VLFEs before the Jishishan earthquake were primarily distributed near the fault zone,with their distribution orientation is consistent with the fault direction.
Jishishan earthquakevery low frequency earthquake(VLFE)earthquake locationenve-lope cross-correlation
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