Journal ArticleDOI
Estimation of the earthquake recurrence parameters for unequal observation periods for different magnitudes
TLDR
In this paper, the authors extended the maximum likelihood estimation of the earthquake parameters N o and β in the relation N = N o exp (− βm ) to the case of events grouped in magnitude with each group observed over individual time periods.Abstract:
Maximum likelihood estimation of the earthquake parameters N o and β in the relation N = N o exp (− βm ) is extended to the case of events grouped in magnitude with each group observed over individual time periods. Asymptotic forms of the equation for β reduce to the estimators given for different special cases by Aki (1965), Utsu (1965, 1966), and Page (1968). The estimates of β are only approximately chi-square distributed. For sufficiently large numbers of events, they can be estimated from the curvature of the log-likelihood function. Sample calculations for three earthquake source zones in western Canada indicate that for well-constrained data sets, the often-used, least-squares estimation procedures lead to compatible results, but for less well-defined data sets, the effect of subjective plotting and weighting methods used for least-squares fitting leads to appreciably different parameters.read more
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OtherDOI
Documentation for the 2008 update of the United States National Seismic Hazard Maps
Mark D. Petersen,Arthur Frankel,Stephen C. Harmsen,Charles S. Mueller,Kathleen M. Haller,Russell L. Wheeler,Robert L. Wesson,Yuehua Zeng,Oliver S. Boyd,David M. Perkins,Nicolas Luco,Edward H. Field,Chris J. Wills,Kenneth S. Rukstales +13 more
TL;DR: In this paper, the authors propose a method to solve the problem of homonymity in homonym identification, i.e., homonymization, in the context of homology.
Journal ArticleDOI
Mapping Seismic Hazard in the Central and Eastern United States
TL;DR: The U.S. Geological Survey (USGS) has been publishing probabilistic seismic hazard maps for the United States since 1976 (e.g., Algermissen and Perkins, 1976; Alger missen et al., 1990) as discussed by the authors.
Journal ArticleDOI
Uniform California Earthquake Rupture Forecast, Version 3 (UCERF3)—The Time‐Independent Model
Edward H. Field,Ramon Arrowsmith,Glenn P. Biasi,Peter Bird,Timothy E. Dawson,Karen R. Felzer,David D. Jackson,Kaj M. Johnson,Thomas H. Jordan,Christopher Madden,Andrew J. Michael,Kevin R. Milner,Morgan T. Page,Tom Parsons,Peter M. Powers,Bruce E. Shaw,Wayne Thatcher,Ray J. Weldon,Yuehua Zeng +18 more
TL;DR: In this article, the authors present the time independent component of the Uniform California Earthquake Rupture Forecast, Version 3 (UCERF3), which provides authoritative estimates of the magnitude, location, and time-averaged frequency of potentially damaging earthquakes in California.
ReportDOI
Recommendations for probabilistic seismic hazard analysis: Guidance on uncertainty and use of experts
TL;DR: Probabilistic Seismic Hazard Analysis (PSHA) is a methodology that estimates the likelihood that various levels of earthquake-caused ground motion will be exceeded at a given location in a given future time period.
Journal ArticleDOI
SeisAn Earthquake Analysis Software
Jens Havskov,Lars Ottemöller +1 more
TL;DR: The SeisAn database is a way of organizing data by using the directory and file structure, and is not a relational data system with general access techniques such as SQL, which usually is meant by the term “database.”
References
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Journal ArticleDOI
Aftershocks and microaftershocks of the great Alaska earthquake of 1964
TL;DR: A detailed investigation of microaftershocks reveals a clustering of events in space and time that is identified with small swarms or secondary aftershocks and is not readily attributed to triggering by tidal strains as mentioned in this paper.
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