Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/3762
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dc.contributor.authorallMalagnini, L.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italiaen
dc.contributor.authorallBodin, P.; Center for Earthquake Research and Information University of Memphisen
dc.contributor.authorallAkinci, A.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italiaen
dc.date.accessioned2008-04-14T13:52:18Zen
dc.date.available2008-04-14T13:52:18Zen
dc.date.issued2004en
dc.identifier.urihttp://hdl.handle.net/2122/3762en
dc.description.abstractWe studied the excitation, propagation, and site effects in the Kachchh basin of India by using ground-motion recordings from a temporary seismograph network deployed to study aftershocks of the Mw 7.6 Bhuj earthquake of 26 January 2001. The Kachchh basin has been proposed as a useful analog region for studying hazard in other earthquake-prone but slowly deforming regions, such as the central United States. The earthquakes we studied ranged in size from about M 2 to M 5.2, and travel paths ranged from a few kilometers to about a hundred kilometers. There was a broad range of focal depths among the aftershocks, so the data were divided into two overlapping subsets to test the sensitivity of the derived propagation and source parameters to focal depth. Parameters we constrained include the source excitation terms (related to stress drop), a frequency-dependent attenuation operator, a geometric spreading function, and an operator to account for site effects. Our results indicate that seismic-wave attenuation in Kachchh crust is very low, similar to other continental intraplate areas such as central and eastern North America. We also estimated seismic moments and stress drops for the earthquakes by fitting singlecorner- frequency source-model spectra to the observed spectra, corrected for propagation by using our derived parameters. Stress drops were found to scale with seismic moment and to be rather high overall. By using a stochastic point-source model to estimate mainshock ground motions, we found that the distance decay of expected peak ground motions, assuming a stress drop of 15–20 MPa, compare well with the scant observations for the Bhuj earthquake. Ground-motion predictions for Kachchh, based on Bhuj aftershock data, support the idea that the region may have similar hazard to proposed analog areas in North America.en
dc.language.isoEnglishen
dc.publisher.nameSSAen
dc.relation.ispartofBulletin of the Seismological Society of Americaen
dc.relation.ispartofseries5/94 (2004)en
dc.subjectGROUND MOTIONen
dc.subjectINDIA, BHUJen
dc.titleGround-Motion Scaling in the Kachchh Basin, India, Deduced fromen
dc.typearticleen
dc.description.statusPublisheden
dc.description.pagenumber1658–1669en
dc.subject.INGV04. Solid Earth::04.06. Seismology::04.06.04. Ground motionen
dc.description.journalTypeJCR Journalen
dc.description.fulltextreserveden
dc.contributor.authorMalagnini, L.en
dc.contributor.authorBodin, P.en
dc.contributor.authorAkinci, A.en
dc.contributor.departmentIstituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italiaen
dc.contributor.departmentCenter for Earthquake Research and Information University of Memphisen
dc.contributor.departmentIstituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italiaen
item.openairetypearticle-
item.cerifentitytypePublications-
item.languageiso639-1en-
item.grantfulltextrestricted-
item.openairecristypehttp://purl.org/coar/resource_type/c_18cf-
item.fulltextWith Fulltext-
crisitem.author.deptIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Roma1, Roma, Italia-
crisitem.author.deptCenter for Earthquake Research and Information University of Memphis-
crisitem.author.deptIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Roma1, Roma, Italia-
crisitem.author.orcid0000-0001-5809-9945-
crisitem.author.orcid0000-0001-8073-3420-
crisitem.author.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.author.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.classification.parent04. Solid Earth-
crisitem.department.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.department.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
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