dor_id: 4132990

506.#.#.a: Público

590.#.#.d: Los artículos enviados a la revista "Geofísica Internacional", se juzgan por medio de un proceso de revisión por pares

510.0.#.a: Consejo Nacional de Ciencia y Tecnología (CONACyT); Scientific Electronic Library Online (SciELO); SCOPUS, Dialnet, Directory of Open Access Journals (DOAJ); Geobase

561.#.#.u: https://www.geofisica.unam.mx/

650.#.4.x: Físico Matemáticas y Ciencias de la Tierra

336.#.#.b: article

336.#.#.3: Artículo de Investigación

336.#.#.a: Artículo

351.#.#.6: http://revistagi.geofisica.unam.mx/index.php/RGI

351.#.#.b: Geofísica Internacional

351.#.#.a: Artículos

harvesting_group: RevistasUNAM

270.1.#.p: Revistas UNAM. Dirección General de Publicaciones y Fomento Editorial, UNAM en revistas@unam.mx

590.#.#.c: Open Journal Systems (OJS)

270.#.#.d: MX

270.1.#.d: México

590.#.#.b: Concentrador

883.#.#.u: https://revistas.unam.mx/catalogo/

883.#.#.a: Revistas UNAM

590.#.#.a: Coordinación de Difusión Cultural

883.#.#.1: https://www.publicaciones.unam.mx/

883.#.#.q: Dirección General de Publicaciones y Fomento Editorial

850.#.#.a: Universidad Nacional Autónoma de México

856.4.0.u: http://revistagi.geofisica.unam.mx/index.php/RGI/article/view/401/414

100.1.#.a: Krishna Singh, Shri; Iglesias-mendoza, Arturo; Quintanar Robles, Luis; Garduño, Victor H.; Ordaz, Mario

524.#.#.a: Krishna Singh, Shri, et al. (2012). A source study of the October,. Geofísica Internacional; Vol. 51 Núm. 1: Enero 1, 2012; 73-86. Recuperado de https://repositorio.unam.mx/contenidos/4132990

245.1.0.a: A source study of the October,

502.#.#.c: Universidad Nacional Autónoma de México

561.1.#.a: Instituto de Geofísica, UNAM

264.#.0.c: 2012

264.#.1.c: 2012-01-01

653.#.#.a: Estimación de movimientos fuerte para la Ciudad de Morelia; efectos de sitio en la faja Volcánica Trans-Mexicana; atenuación; Strong motion estimation for Morelia city; Site effects in Central Trans-Mexican Volcanic Belt; Attenuation

506.1.#.a: La titularidad de los derechos patrimoniales de esta obra pertenece a las instituciones editoras. Su uso se rige por una licencia Creative Commons BY-NC-SA 4.0 Internacional, https://creativecommons.org/licenses/by-nc-sa/4.0/legalcode.es, para un uso diferente consultar al responsable jurídico del repositorio por medio del correo electrónico revistagi@igeofisica.unam.mx

884.#.#.k: http://revistagi.geofisica.unam.mx/index.php/RGI/article/view/401

001.#.#.#: 063.oai:revistagi.geofisica.unam.mx:article/401

041.#.7.h: spa

520.3.#.a: We analyze an earthquake sequence of seven small events (2.5<Mw<3.0) which occurred in Morelia, Mexico during a 33-hour period in October, 2007 and was recorded by two local stations. Morelia lies in Central Trans-Mexican Volcanic Belt (CTMVB). The waveforms and spectra of the events are surprising similar, suggesting that their locations and focal mechanisms were nearly identical. Waveform inversion, with constraints imposed from mapped faults in the area (strike ~E-W, dipping to the north) yields a focal mechanism defined by , , and , consistent with reported focal mechanisms in the region. For these small events, the signal is lost in the noise at f<0.2Hz. For this reason, we estimate seismic moment, , from S-wave spectrum in the frequency band of 0.2≤f≤1Hz. Unfortunately, in this band significant amplification of seismic waves, caused by upper low-velocity volcanic rocks, is expected at all sites in the CTMVB. In the estimation of and interpretation of the observed spectra, we approximate the amplification by H/Z spectral ratio. Assuming an -source model, the observed spectra can be explained by the (Δσ, t*, ) triplets of (5 MPa, 0.02 s, 20 Hz) and (20 MPa, 0.03 s, 20 Hz), where Δσ is the Brune stress drop, and t*and are attenuation parameters. We use these parameters and EGF and RVT techniques to simulate ground motions for a postulated earthquake. The estimated horizontal PGAs and PGVs at the two sites in Morelia with Δσ=5MPa range between 23 and 46 cm/ and 1.5 and 3.52 cm/s, respectively. The predicted values are almost twice as large for Δσ=20MPa: 44-89 cm/ and 2.5-6.1 cm/s. Our estimated PGAs, especially that for Δσ=5MPa, are significantly smaller than those predicted from regression of world-wide data, suggesting either higher attenuation in this volcanic region and/or inadequate estimation of the site effect, and the attenuation parameters t*and f .doi: https://doi.org/10.22201/igeof.00167169p.2012.51.1.147

773.1.#.t: Geofísica Internacional; Vol. 51 Núm. 1: Enero 1, 2012; 73-86

773.1.#.o: http://revistagi.geofisica.unam.mx/index.php/RGI

022.#.#.a: ISSN-L: 2954-436X; ISSN impreso: 0016-7169

310.#.#.a: Trimestral

300.#.#.a: Páginas: 73-86

264.#.1.b: Instituto de Geofísica, UNAM

doi: https://doi.org/10.22201/igeof.00167169p.2012.51.1.147

handle: 353b414da6e0953c

harvesting_date: 2023-06-20 16:00:00.0

856.#.0.q: application/pdf

file_creation_date: 2011-12-16 19:18:25.0

file_modification_date: 2022-07-05 16:09:42.0

file_creator: Shri Krishna Singh

file_name: 9fbc861a4c0d76bef1e47a63dad267f574e7933d129f3640ccb2c0eab1fbab16.pdf

file_pages_number: 14

file_format_version: application/pdf; version=1.6

file_size: 1169376

245.1.0.b: A source study of the October, 2007 earthquake sequence of Morelia, Mexico and ground-motion estimation from larger earthquakes in the region

last_modified: 2023-06-20 16:00:00

license_url: https://creativecommons.org/licenses/by-nc-sa/4.0/legalcode.es

license_type: by-nc-sa

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