Relative Moment Tensor Inversion with Application to Shallow Underground Explosions and Earthquakes

Abstract

Research Article| August 14, 2018 Relative Moment Tensor Inversion with Application to Shallow Underground Explosions and Earthquakes Anastasia Stroujkova Anastasia Stroujkova aWeston Geophysical Corp., 181 Bedford Street Suite 1, Lexington, Massachusetts 02420, ana@westongeo.com Search for other works by this author on: GSW Google Scholar Author and Article Information Anastasia Stroujkova aWeston Geophysical Corp., 181 Bedford Street Suite 1, Lexington, Massachusetts 02420, ana@westongeo.com Publisher: Seismological Society of America First Online: 14 Aug 2018 Online Issn: 1943-3573 Print Issn: 0037-1106 © Seismological Society of America Bulletin of the Seismological Society of America (2018) 108 (5A): 2724–2738. https://doi.org/10.1785/0120180082 Article history First Online: 14 Aug 2018 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Anastasia Stroujkova; Relative Moment Tensor Inversion with Application to Shallow Underground Explosions and Earthquakes. Bulletin of the Seismological Society of America 2018;; 108 (5A): 2724–2738. doi: https://doi.org/10.1785/0120180082 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyBulletin of the Seismological Society of America Search Advanced Search Abstract Single‐source moment tensor (MT) techniques require calculation of the Green’s functions. This limits applicability of the approach to low frequencies because Green’s function calculations are very sensitive to media heterogeneities, especially at high frequencies. Relative moment tensor inversion (RMTI) developed by Dahm (1996) eliminates the need for calculation of the Green’s functions. In this article, the RMTI method is modified to perform MT inversion for a group of closely located shallow seismic events (e.g., underground explosions) by incorporating amplitudes for short‐period fundamental‐mode Rayleigh waves (Rg). The main benefits of the modified method are (1) it can be used in any frequency range provided the signal‐to‐noise ratio is high enough in that range, and (2) the method allows the calculation of the Green’s functions in any frequency range, self‐consistently, after the MT inversion is complete. The robustness of the approach for MT inversion and Green’s function estimation for the small shallow events was tested using synthetic data as well as a small chemical explosion dataset (e.g., Stroujkova et al., 2017). You do not have access to this content, please speak to your institutional administrator if you feel you should have access.