Spatial distribution and B value of intermediate-depth earthquakes beneath central Peru

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dc.contributor.authorSchneider, John F.
dc.contributor.authorSelwyn Sacks, I.
dc.contributor.authorHuaco, Daniel
dc.contributor.authorOcola, Leonidas
dc.contributor.authorNorabuena Ortiz, Edmundo
dc.contributor.authorFlores, Antonio
dc.coverage.spatialPerú
dc.date.accessioned2018-07-31T19:02:28Z
dc.date.available2018-07-31T19:02:28Z
dc.date.issued1988-11
dc.description.abstractWe have investigated the spatial distribution of microseismicity at intermediate depth in the Wadati-Benioff (W-B) zone beneath central Peru. Within a 100 to 150 km depth range in the subducting Nazca plate, 67 event hypocenters define a horizontally subducting zone (horizontal zone) 450 to 600 km from the trench, and a zone of increasing dip (resubduction zone) 600 to 700 km from the trench. Although the shape of the W-B zone is generally consistent with previous observations from teleseismic data, the distribution of seismicity is not. In a 550 km wide band extending from 400 to 750 km from the trench, the density of teleseismicity (mb > 4, 1971–1981) increases as a function of distance from the trench, while the density of microseismicity (1.6 < mb < 4.2) decreases. Combining local and teleseismic data, the b value changes from .84 in the horizontal zone to .57 in the resubduction zone. This result suggests that the minimum earthquake size and/or stress drop increases in the resubduction zone. Low b-values may also be intrinsic to proximity to the seismic cut-off at 150 km depth.es_ES
dc.description.peer-reviewPor pareses_ES
dc.formatapplication/pdfes_ES
dc.identifier.citationSchneider, J. F., Selwyn, I., Huaco, D., Ocola, L., Norabuena, E. & Flores, A. (1988). Spatial distribution and B value of intermediate-depth earthquakes beneath central Peru.==$Geophysical Research Letter, 15$==(12),1421-1424. https://doi.org/10.1029/GL015i012p01421es_ES
dc.identifier.doihttps://doi.org/10.1029/GL015i012p01421es_ES
dc.identifier.govdocindex-oti2018
dc.identifier.journalGeophysical Research Letterses_ES
dc.identifier.urihttp://hdl.handle.net/20.500.12816/2143
dc.language.isoenges_ES
dc.publisherAmerican Geophysical Uniones_ES
dc.relation.ispartofurn:issn:0094-8276
dc.rightsinfo:eu-repo/semantics/closedAccesses_ES
dc.subjectEarthquakeses_ES
dc.subjectMicroseismicityes_ES
dc.subjectSubductiones_ES
dc.subjectTectonic platees_ES
dc.subjectSeismologyes_ES
dc.subjectEarth scienceses_ES
dc.subject.ocdehttp://purl.org/pe-repo/ocde/ford#1.05.04es_ES
dc.titleSpatial distribution and B value of intermediate-depth earthquakes beneath central Perues_ES
dc.typeinfo:eu-repo/semantics/articlees_ES

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