The Relationship between M and ML: A Review and Application to Induced Seismicity in the Groningen Gas Field, The Netherlands
2018; Seismological Society of America; Volume: 89; Issue: 3 Linguagem: Inglês
10.1785/02201700247
ISSN1938-2057
AutoresBernard Dost, Benjamin Edwards, Julian J. Bommer,
Tópico(s)Seismic Waves and Analysis
ResumoResearch Article| March 28, 2018 The Relationship between M and ML: A Review and Application to Induced Seismicity in the Groningen Gas Field, The Netherlands Bernard Dost; Bernard Dost aRoyal Netherlands Meteorological Institute (KNMI), Utrechtseweg 297, NL‐3731 GA De Bilt, The Netherlands, bernard.dost@knmi.nl Search for other works by this author on: GSW Google Scholar Benjamin Edwards; Benjamin Edwards bDepartment of Earth, Ocean and Ecological Sciences, University of Liverpool, 4 Brownlow Street, Liverpool L69 3GP, United Kingdom Search for other works by this author on: GSW Google Scholar Julian J. Bommer Julian J. Bommer cDepartment of Civil & Environmental Engineering, Imperial College London, London SW7 2AZ, United Kingdom Search for other works by this author on: GSW Google Scholar Seismological Research Letters (2018) 89 (3): 1062–1074. https://doi.org/10.1785/02201700247 Article history first online: 28 Mar 2018 Connected Content Errata: The Relationship between M and ML: A Review and Application to Induced Seismicity in the Groningen Gas Field, The Netherlands Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Bernard Dost, Benjamin Edwards, Julian J. Bommer; The Relationship between M and ML: A Review and Application to Induced Seismicity in the Groningen Gas Field, The Netherlands. Seismological Research Letters 2018;; 89 (3): 1062–1074. doi: https://doi.org/10.1785/02201700247 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 use of local magnitude (ML) in seismic hazard analyses is a topic of recent debate. In regions of weak or moderate seismicity, small earthquakes (characterized by ML) are commonly used to determine frequency–magnitude distributions (FMDs) for probabilistic seismic hazard calculations. However, empirical and theoretical studies on the relation between moment magnitude (M) and ML for small earthquakes show a systematic difference between the two below a region‐dependent magnitude threshold. This difference may introduce bias in the estimation of the frequency of larger events with given M, and consequently seismic hazard. For induced seismicity related to the Groningen gas field, this magnitude threshold is determined to be M∼2, with equality between M and ML at higher magnitudes. A quadratic relation between M and ML is derived for 0.5<ML<2, in correspondence to recent theoretical studies. Although the seismic hazard analysis for Groningen is internally consistent when expressed in terms of ML (with the implicit assumption of equivalence between the two scales), a more physical interpretation of the seismicity model requires transformation of the earthquake catalog from local to moment magnitude, especially because the dataset currently used in estimating time‐dependent hazard consists mainly of ML<2.5 events. We show that measured station effects, derived from M calculations, correspond to predicted model calculations used to determine a ground‐motion model for the region. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.
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