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dc.contributor.authorSonnemann, Tim
dc.contributor.authorHalldorsson, Benedikt
dc.contributor.authorJonsson, Sigurjon
dc.date.accessioned2019-08-01T08:11:17Z
dc.date.available2019-08-01T08:11:17Z
dc.date.issued2019-06-25
dc.identifier.citationSonnemann, T., Halldorsson, B., & Jónsson, S. (2019). Automatic estimation of earthquake high-frequency strong-motion spectral decay in south Iceland. Soil Dynamics and Earthquake Engineering, 125, 105676. doi:10.1016/j.soildyn.2019.05.015
dc.identifier.doi10.1016/j.soildyn.2019.05.015
dc.identifier.urihttp://hdl.handle.net/10754/656287
dc.description.abstractWe present an adaptive automated algorithm for estimating the spectral decay of high frequency waves from recorded acceleration time histories of strong ground motion, along with a simple P- and S-phase picking algorithm to achieve complete automation. Our approach negotiates site resonance peaks and spectral corners through a spectral linearity criterion that on average provides indistinguishable results compared to manual estimates. The overall spectral decay, represented by the so-called “kappa” (κ) parameter, is demonstrated on a dataset of accelerograms from earthquakes of magnitudes 3.7-6.5 at distances of 1–76 km recorded on site conditions classified as rock and stiff soil, respectively, in South Iceland. The automatic procedure gives an average estimate of κ¯=37.2±13.6 ms on rock. The data did not allow the robust determination of linear distance dependence, nor a distinction of κ between the two site classes due to the generally large scatter of κ values. Using a subset of stations for the analysis however, a slight distance-dependence could be observed but is likely due to the influence of the quality factor being proportional to frequency. The results indicate that source and site effects drive κ values in South Iceland, and that a formal inclusion of source contributions to the parametrization and analysis of the spectral decay is needed.
dc.description.sponsorshipThis study was supported by the Icelandic Centre for Research (Grant of Excellence No. 141261-051/052/053) and the Research Fund of the University of Iceland. The authors gratefully acknowledge Dr. Símon Ólafsson that provided the dataset, also available at the Internet Site for European Strong-motion Data (http://www.isesd.hi.is). The manuscript was benefitted greatly from discussions with Prof. Apostolos S. Papageorgiou at the University of Patras.
dc.publisherElsevier BV
dc.relation.urlhttps://linkinghub.elsevier.com/retrieve/pii/S0267726118310923
dc.rightsNOTICE: this is the author’s version of a work that was accepted for publication in Soil Dynamics and Earthquake Engineering. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Soil Dynamics and Earthquake Engineering, [[Volume], [Issue], (2019-06-25)] DOI: 10.1016/j.soildyn.2019.05.015 . © 2019. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/
dc.subjectNear-surface attenuation
dc.subjectStrong ground motion
dc.subjectHigh frequency amplitude decay
dc.subjectKappa
dc.titleAutomatic estimation of earthquake high-frequency strong-motion spectral decay in south Iceland
dc.typeArticle
dc.contributor.departmentCrustal Deformation and InSAR Group
dc.contributor.departmentEarth Science and Engineering
dc.contributor.departmentEarth Science and Engineering Program
dc.contributor.departmentPhysical Science and Engineering (PSE) Division
dc.identifier.journalSoil Dynamics and Earthquake Engineering
dc.rights.embargodate2021-06-25
dc.eprint.versionPost-print
dc.contributor.institutionEarthquake Engineering Research Centre and Faculty of Civil and Environmental Engineering, School of Engineering and Natural Sciences, University of Iceland, Austurvegur 2a, 800, Selfoss, Iceland
dc.contributor.institutionDivision of Processing and Research, Icelandic Meteorological Office, Bustadavegur 7-9, 108, Reykjavik, Iceland
kaust.personJonsson, Sigurjon
dc.date.published-online2019-06-25
dc.date.published-print2019-10


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NOTICE: this is the author’s version of a work that was accepted for publication in Soil Dynamics and Earthquake Engineering. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Soil Dynamics and Earthquake Engineering, [[Volume], [Issue], (2019-06-25)] DOI: 10.1016/j.soildyn.2019.05.015 . © 2019. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
Except where otherwise noted, this item's license is described as NOTICE: this is the author’s version of a work that was accepted for publication in Soil Dynamics and Earthquake Engineering. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Soil Dynamics and Earthquake Engineering, [[Volume], [Issue], (2019-06-25)] DOI: 10.1016/j.soildyn.2019.05.015 . © 2019. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/