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Slip Distribution of the 1985 Valparaíso Earthquake Constrained with Seismic and Deformation Data

2019; Seismological Society of America; Linguagem: Inglês

10.1785/0220180396

1938-2057

Francisco Bravo, Pablo Alejandro Hevia Koch, Sebastián Riquelme, Mauricio Fuentes, Jaime Campos,

Earthquake Detection and Analysis

Research Article| May 01, 2019 Slip Distribution of the 1985 Valparaíso Earthquake Constrained with Seismic and Deformation Data Francisco Bravo; Francisco Bravo aFaculty of Physical and Mathematical Sciences, National Seismological Center, University of Chile, Blanco Encalada 2002, Santiago, Chile, fbravo@csn.uchile.cl, pkoch@csn.uchile.cl, sebastian@csn.uchile.cl Search for other works by this author on: GSW Google Scholar Pablo Koch; Pablo Koch aFaculty of Physical and Mathematical Sciences, National Seismological Center, University of Chile, Blanco Encalada 2002, Santiago, Chile, fbravo@csn.uchile.cl, pkoch@csn.uchile.cl, sebastian@csn.uchile.cl Search for other works by this author on: GSW Google Scholar Sebastian Riquelme; Sebastian Riquelme aFaculty of Physical and Mathematical Sciences, National Seismological Center, University of Chile, Blanco Encalada 2002, Santiago, Chile, fbravo@csn.uchile.cl, pkoch@csn.uchile.cl, sebastian@csn.uchile.cl Search for other works by this author on: GSW Google Scholar Mauricio Fuentes; Mauricio Fuentes bGeophysics Department, Faculty of Physical and Mathematical Sciences, University of Chile, Blanco Encalada 2002, Santiago, Chile, mauricio@dgf.uchile.cljaime@dgf.uchile.cl Search for other works by this author on: GSW Google Scholar Jaime Campos Jaime Campos bGeophysics Department, Faculty of Physical and Mathematical Sciences, University of Chile, Blanco Encalada 2002, Santiago, Chile, mauricio@dgf.uchile.cljaime@dgf.uchile.cl Search for other works by this author on: GSW Google Scholar Author and Article Information Francisco Bravo aFaculty of Physical and Mathematical Sciences, National Seismological Center, University of Chile, Blanco Encalada 2002, Santiago, Chile, fbravo@csn.uchile.cl, pkoch@csn.uchile.cl, sebastian@csn.uchile.cl Pablo Koch aFaculty of Physical and Mathematical Sciences, National Seismological Center, University of Chile, Blanco Encalada 2002, Santiago, Chile, fbravo@csn.uchile.cl, pkoch@csn.uchile.cl, sebastian@csn.uchile.cl Sebastian Riquelme aFaculty of Physical and Mathematical Sciences, National Seismological Center, University of Chile, Blanco Encalada 2002, Santiago, Chile, fbravo@csn.uchile.cl, pkoch@csn.uchile.cl, sebastian@csn.uchile.cl Mauricio Fuentes bGeophysics Department, Faculty of Physical and Mathematical Sciences, University of Chile, Blanco Encalada 2002, Santiago, Chile, mauricio@dgf.uchile.cljaime@dgf.uchile.cl Jaime Campos bGeophysics Department, Faculty of Physical and Mathematical Sciences, University of Chile, Blanco Encalada 2002, Santiago, Chile, mauricio@dgf.uchile.cljaime@dgf.uchile.cl Publisher: Seismological Society of America First Online: 01 May 2019 Online Issn: 1938-2057 Print Issn: 0895-0695 © Seismological Society of America Seismological Research Letters (2019) 90 (5): 1792–1800. https://doi.org/10.1785/0220180396 Article history First Online: 01 May 2019 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Francisco Bravo, Pablo Koch, Sebastian Riquelme, Mauricio Fuentes, Jaime Campos; Slip Distribution of the 1985 Valparaíso Earthquake Constrained with Seismic and Deformation Data. Seismological Research Letters 2019;; 90 (5): 1792–1800. doi: https://doi.org/10.1785/0220180396 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 The 2017 Valparaíso seismic sequence calls attention to the potential seismic hazard for a megathrust earthquake in central Chile. Previous large historic earthquakes have been studied to improve our knowledge of the seismotectonic context in this region. In this work, we studied the slip distribution of the 3 March 1985 Mw 8.0 Valparaíso earthquake. To model this event, we use a finite‐fault model and a linear inversion scheme, incorporating data of near‐field displacement, surface waves, and P, SH, and PP waves. The results show that the rupture propagated 90 km southward and 80 km northward from the hypocenter, with a total duration of 65 s. The slip is concentrated mainly on two patches of the rupture between 20 and 40 km depth. The patch of maximum slip is near the nucleation zone. The obtained slip distribution is in agreement with the asperities model, which describes the seismicity of central Chile. We confirm that the source did not break the upper part of the subduction interface and that a large tsunamigenic potential is still present in this region. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.