Accurate hypocenter locations are essential for seismic event analysis. Single-event location estimation methods provide relatively imprecise results in remote regions with few nearby seismic stations. Previous work has demonstrated that improved relative epicentroid precision in oceanic environments is obtainable using surface-wave cross correlation measurements. We use intermediate-period regional and teleseismic Rayleigh and Love waves to estimate relative epicentroid locations of moderately-sized seismic events in regions around Iran. Variations in faulting geometry, depth, and intermediate-period dispersion make surface-wave based event relocation challenging across this broad continental region. We compare and integrate surface-wave based relative locations with InSAR centroid location estimates. However, mapping an earthquake sequence mainshock to an InSAR fault deformation model centroid is not always a simple process, since the InSAR observations are sensitive to post-seismic deformation. We explore these ideas using earthquake sequences in western Iran. We also apply surface-wave relocation to smaller magnitude earthquakes (3.5 < M < 5.0). Inclusion of smaller-magnitude seismic events in a relocation effort requires a shift in bandwidth to shorter periods, which increases the sensitivity of relocations to surface-wave dispersion. Frequency-domain inter-event phase observations are used to understand the time-domain cross-correlation information, and to choose the appropriate band for applications using shorter periods. Over short inter-event distances, the changing group velocity does not strongly degrade the relative locations. For small-magnitude seismic events in continental regions, surface-wave relocation does not appear simple enough to allow broad routine application, but using this method to analyze individual earthquake sequences can provide valuable insight into earthquake and faulting processes.
How about adding a README file? We currently accept plain text (README.txt) and markdown (README.md) files. Note: You may need to refresh to see an README file you just uploaded.
Items in this Work
|The derivative for agu2017_kintner.pdf was not successfully created||6 months ago|
|User Jonas Andreas Kintner has attached agu2017_kintner.pdf to Surface Wave Relocation Methods Applied to Remote Continental Earthquakes||6 months ago|
|File could not be sent to SHARE Notify||6 months ago|
|User Jonas Andreas Kintner has updated Surface Wave Relocation Methods Applied to Remote Continental Earthquakes||6 months ago|
|The derivative for Kintner_agu2017.pdf was not successfully created||6 months ago|
|User Jonas Andreas Kintner has attached Kintner_agu2017.pdf to Surface Wave Relocation Methods Applied to Remote Continental Earthquakes||6 months ago|
|User Jonas Andreas Kintner has deposited Surface Wave Relocation Methods Applied to Remote Continental Earthquakes||6 months ago|