Spatiotemporal evolution of the completeness magnitude of the Icelandic earthquake catalogue from 1991 to 2013.

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Bibliographic Details
Title:	Spatiotemporal evolution of the completeness magnitude of the Icelandic earthquake catalogue from 1991 to 2013.
Authors:	Panzera, Francesco¹ fpanzera@unict.it, Mignan, Arnaud² arnaud.mignan@sed.ethz.ch, Vogfjörð, Kristin³ vogfjord@vedur.is
Source:	Journal of Seismology. Jul2017, Vol. 21 Issue 4, p615-630. 16p.
Subject Terms:	Spatiotemporal processes, Completeness theorem, Seismic networks, Seismic waves, *Plate tectonics
Abstract:	In 1991, a digital seismic monitoring network was installed in Iceland with a digital seismic system and automatic operation. After 20 years of operation, we explore for the first time its nationwide performance by analysing the spatiotemporal variations of the completeness magnitude. We use the Bayesian magnitude of completeness (BMC) method that combines local completeness magnitude observations with prior information based on the density of seismic stations. Additionally, we test the impact of earthquake location uncertainties on the BMC results, by filtering the catalogue using a multivariate analysis that identifies outliers in the hypocentre error distribution. We find that the entire North-to-South active rift zone shows a relatively low magnitude of completeness M in the range 0.5-1.0, highlighting the ability of the Icelandic network to detect small earthquakes. This work also demonstrates the influence of earthquake location uncertainties on the spatiotemporal magnitude of completeness analysis. [ABSTRACT FROM AUTHOR]
Database:	Energy & Power Source

Description
Abstract:	In 1991, a digital seismic monitoring network was installed in Iceland with a digital seismic system and automatic operation. After 20 years of operation, we explore for the first time its nationwide performance by analysing the spatiotemporal variations of the completeness magnitude. We use the Bayesian magnitude of completeness (BMC) method that combines local completeness magnitude observations with prior information based on the density of seismic stations. Additionally, we test the impact of earthquake location uncertainties on the BMC results, by filtering the catalogue using a multivariate analysis that identifies outliers in the hypocentre error distribution. We find that the entire North-to-South active rift zone shows a relatively low magnitude of completeness M in the range 0.5-1.0, highlighting the ability of the Icelandic network to detect small earthquakes. This work also demonstrates the influence of earthquake location uncertainties on the spatiotemporal magnitude of completeness analysis. [ABSTRACT FROM AUTHOR]
ISSN:	13834649
DOI:	10.1007/s10950-016-9623-3