Quick Determination of the Earthquake Focal Mechanism from the Azimuthal Variation of the Initial P‐Wave Amplitude

Research Article| April 24, 2019 Quick Determination of the Earthquake Focal Mechanism from the Azimuthal Variation of the Initial P‐Wave Amplitude Stefania Tarantino; Stefania Tarantino Corresponding Author aDipartimento di Fisica, Università degli Studi di Napoli Federico II, Complesso Universitario di Monte Sant’Angelo, Via Cinthia, 21, 80126 Naples, Italy, stefania.tarantino@unina.itsimona.colombelli@unina.itantonio.emolo@na.infn.italdo.zollo@unina.it Search for other works by this author on: GSW Google Scholar Simona Colombelli; Simona Colombelli aDipartimento di Fisica, Università degli Studi di Napoli Federico II, Complesso Universitario di Monte Sant’Angelo, Via Cinthia, 21, 80126 Naples, Italy, stefania.tarantino@unina.itsimona.colombelli@unina.itantonio.emolo@na.infn.italdo.zollo@unina.it Search for other works by this author on: GSW Google Scholar Antonio Emolo; Antonio Emolo aDipartimento di Fisica, Università degli Studi di Napoli Federico II, Complesso Universitario di Monte Sant’Angelo, Via Cinthia, 21, 80126 Naples, Italy, stefania.tarantino@unina.itsimona.colombelli@unina.itantonio.emolo@na.infn.italdo.zollo@unina.it Search for other works by this author on: GSW Google Scholar Aldo Zollo Aldo Zollo aDipartimento di Fisica, Università degli Studi di Napoli Federico II, Complesso Universitario di Monte Sant’Angelo, Via Cinthia, 21, 80126 Naples, Italy, stefania.tarantino@unina.itsimona.colombelli@unina.itantonio.emolo@na.infn.italdo.zollo@unina.it Search for other works by this author on: GSW Google Scholar Author and Article Information Stefania Tarantino Corresponding Author aDipartimento di Fisica, Università degli Studi di Napoli Federico II, Complesso Universitario di Monte Sant’Angelo, Via Cinthia, 21, 80126 Naples, Italy, stefania.tarantino@unina.itsimona.colombelli@unina.itantonio.emolo@na.infn.italdo.zollo@unina.it Simona Colombelli aDipartimento di Fisica, Università degli Studi di Napoli Federico II, Complesso Universitario di Monte Sant’Angelo, Via Cinthia, 21, 80126 Naples, Italy, stefania.tarantino@unina.itsimona.colombelli@unina.itantonio.emolo@na.infn.italdo.zollo@unina.it Antonio Emolo aDipartimento di Fisica, Università degli Studi di Napoli Federico II, Complesso Universitario di Monte Sant’Angelo, Via Cinthia, 21, 80126 Naples, Italy, stefania.tarantino@unina.itsimona.colombelli@unina.itantonio.emolo@na.infn.italdo.zollo@unina.it Aldo Zollo aDipartimento di Fisica, Università degli Studi di Napoli Federico II, Complesso Universitario di Monte Sant’Angelo, Via Cinthia, 21, 80126 Naples, Italy, stefania.tarantino@unina.itsimona.colombelli@unina.itantonio.emolo@na.infn.italdo.zollo@unina.it Publisher: Seismological Society of America First Online: 24 Apr 2019 Online Issn: 1938-2057 Print Issn: 0895-0695 © Seismological Society of America Seismological Research Letters (2019) 90 (4): 1642–1649. https://doi.org/10.1785/0220180290 Article history First Online: 24 Apr 2019 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Stefania Tarantino, Simona Colombelli, Antonio Emolo, Aldo Zollo; Quick Determination of the Earthquake Focal Mechanism from the Azimuthal Variation of the Initial P‐Wave Amplitude. Seismological Research Letters 2019;; 90 (4): 1642–1649. doi: https://doi.org/10.1785/0220180290 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 SocietySeismological Research Letters Search Advanced Search ABSTRACT When an earthquake occurs, a key parameter in the emergency’s management is the knowledge of the most stressed areas by the ground motion. The focal mechanism is an essential source parameter for producing realistic shake maps. Although the approaches for estimating earthquake location and magnitude are now consolidated, automatic solutions for the focal mechanism are not always provided by the agencies or available at later times after inversion of waveforms for the determination of moment tensor components. We introduce a new approach for the automatic determination of the earthquake focal mechanism, using the spatial distribution of observed absolute initial P‐wave peak amplitudes, corrected for the geometrical attenuation effect, in an evolutionary, Bayesian framework. We applied the proposed methodology to the main earthquakes of the 2016–2017 central Italy seismic sequence finding that our rapid automatic estimates of the focal mechanism are in good agreement with those of the reference solutions. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.