[SSS04-01] Separation of High-frequency Source and Path Effects from South Africa Mine Data
Keywords:South Africa Mine, High-frequency , Earthquakes
This dataset provides an excellent opportunity to investigate the high-frequency characteristics of the seismic waveforms because stations are located at distances of several hundred meters to a few kilometers and installed on hard rock sites at 1 to 3 km depth in the mine, which minimizes the site effects. We also compared the waveforms from the subsurface mine stations with stations located on the surface.
Preliminary results indicate that for the lower frequencies, there is relatively more contribution from the source effects, while at higher frequencies the path effects are larger. High frequency content due to both the source and path are likely related to the wavelengths of the geological heterogeneities of the region.