dor_id: 4141414

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/1453/1707

100.1.#.a: Singh, Shri Krishna; Iglesias Mendoza, Arturo; Arroyo, D.; Pérez-campos, Xyoli; Ordaz, M.; Mendoza, C.; Corona-fernández, R. D.; Espíndola, V. H.; González-ávila, D.; Martínez-lópez, R.; Castro-artola, O.; Santoyo, M. A.; Franco, S. I.

524.#.#.a: Singh, Shri Krishna, et al. (2023). A Seismological Study of the Michoacán-Colima, Mexico, Earthquake of 19 September. Geofísica Internacional; Vol. 62 Núm. 2: Abril 1, 2023; 445-465. Recuperado de https://repositorio.unam.mx/contenidos/4141414

245.1.0.a: A Seismological Study of the Michoacán-Colima, Mexico, Earthquake of 19 September

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

561.1.#.a: Instituto de Geofísica, UNAM

264.#.0.c: 2023

264.#.1.c: 2023-04-01

653.#.#.a: Sismo de Michoacán-Colima; Sismos Quasi-repetidos; Directividad; Michoacan-Colima Earthquake; Quasi-repeated events; Directivity

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/1453

001.#.#.#: 063.oai:revistagi.geofisica.unam.mx:article/1453

041.#.7.h: spa

520.3.#.a: Michoacán-Colima earthquake of 19 September 2022 (Ms 7.6, Mw 7.6) ruptured the NW end of the Cocos-North American plate interface, causing severe damage to many towns and cities in the states of Michoacán and Colima. The damage was further exacerbated by a major aftershock (Mw 6.7) on 22 September. The mainshock initiated below the coast at a hypocentral distance of 22 km from the seismic station of Maruata (MMIG) where peak ground acceleration and velocity, PGA and PGV, of ~ 1 g and 28 cm/s were recorded. The epicenter of the major aftershock was located ~ 30 km SE of the mainshock. Finite fault modeling of the mainshock by the U.S. Geological Survey reveals a rupture propagation along the strike towards the NW and yields a static stress drop, Δσs, of 3.7 MPa. Our estimated radiated energy, ER, is 3.44x1015J, so that ER /M0 is 1.27 × 10−5 similar to other large Mexican thrust earthquakes whose rupture areas do not extend to the trench.Aftershocks of the 2022 mainshock overlap that of the Colima earthquake of 30 January 1973 (Mw7.6). Galitzin seismograms of the two earthquakes at DeBilt (DBN), The Netherlands, are reasonably similar so that they may be classified as quasi-repeated events. On the other hand, the DBN seismogram of the earthquake of 15 April 1941 (MS 7.7), whose location is poorly known but occurred in the same region, differs greatly from those of the 1973 and 2022 earthquakes, suggesting a different source area for the 1941 event.An analysis of the extensive regional recordings exhibits the effect of the directivity on the ground motion and on the ratio of ground motion during the mainshock to the major aftershock.  The directivity explains the observed azimuthal dependence of PGA and PGV ratios, spectral ratios, and PGA and response spectra at 2s, Sa (T = 2 s). Because of the directivity, PGA, PGV, and Sa (T = 2 s) in the Valley of Mexico during the mainshock and the major aftershock were about the same in spite of the magnitude difference of 0.9. At CU (the reference, hard site in Mexico City), PGA and PGV during both events were ~ 6 cm/s2 and 2 cm/s, respectively, lower than expected for the mainshock and higher than expected for the aftershock.

773.1.#.t: Geofísica Internacional; Vol. 62 Núm. 2: Abril 1, 2023; 445-465

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: 445-465

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

doi: https://doi.org/10.22201/igeof.2954436xe.2023.62.2.1453

handle: 00f147f4fb800283

harvesting_date: 2023-06-20 17:00:00.0

856.#.0.q: application/pdf

file_creation_date: 2023-03-24 18:10:24.0

file_modification_date: 2023-03-24 18:51:14.0

file_creator: S. K. Singh

file_name: dcdd42fa72cd6dce2e6dae98b278f2211392ba7689ad298e84ad5082700a5b03.pdf

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245.1.0.b: A Seismological Study of the Michoacán-Colima, Mexico, Earthquake of 19 September 2022 (Mw7.6)

last_modified: 2023-06-20 17:00:00

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

license_type: by-nc-sa

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