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Seismicity at the northeast edge of the Mexican Volcanic Belt (MVB) and activation of an undocumented fault: the Peñamiller earthquake sequence of 2010–2011, Querétaro, Mexico

التفاصيل البيبلوغرافية
العنوان: Seismicity at the northeast edge of the Mexican Volcanic Belt (MVB) and activation of an undocumented fault: the Peñamiller earthquake sequence of 2010–2011, Querétaro, Mexico
المؤلفون: A. Clemente-Chavez, A. Figueroa-Soto, F. R. Zúñiga, M. Arroyo, M. Montiel, O. Chavez
المصدر: Natural Hazards and Earth System Sciences, Vol 13, Iss 10, Pp 2521-2531 (2013)
بيانات النشر: Copernicus Publications, 2013.
سنة النشر: 2013
المجموعة: LCC:Environmental technology. Sanitary engineering
LCC:Geography. Anthropology. Recreation
LCC:Environmental sciences
LCC:Geology
مصطلحات موضوعية: Environmental technology. Sanitary engineering, TD1-1066, Geography. Anthropology. Recreation, Environmental sciences, GE1-350, Geology, QE1-996.5
الوصف: The town of Peñamiller in the state of Querétaro, Mexico, is located at the northeast border of the seismogenic zone known as the Mexican Volcanic Belt (MVB), which transects the central part of Mexico with an east–west orientation. In the vicinity of this town, a sequence of small earthquakes occurred during the end of 2010 and beginning of 2011. Seismicity in the continental regimen of central Mexico is not too frequent; however, it is known that there are precedents of large earthquakes (Mw magnitude greater than 6.0) occurring in this zone. Three large earthquakes have occurred in the past 100 yr: the 19 November 1912 (MS = 7.0), the 3 January 1920 (MS = 6.4), and the 29 June 1935 (MS = 6.9) earthquakes. Prior to the instrumental period, the earthquake of 11 February 1875, which took place near the city of Guadalajara, caused widespread damage. The purpose of this article is to contribute to the available seismic information of this region. This will help advance our understanding of the tectonic situation of the central Mexico MVB region. Twenty-four shallow earthquakes of the Peñamiller seismic sequence of 2011 were recorded by a temporary accelerograph network installed by the Universidad Autónoma de Querétaro (UAQ). The data were analyzed in order to determine the source locations and to estimate the source parameters. The study was carried out through an inversion process and by spectral analysis. The results show that the largest earthquake occurred on 8 February 2011 at 19:53:48.6 UTC, had a moment magnitude Mw = 3.5, and was located at latitude 21.039° and longitude −99.752°, at a depth of 5.6 km. This location is less than 7 km away in a south-east direction from downtown Peñamiller. The focal mechanisms are mostly normal faults with small lateral components. These focal mechanisms are consistent with the extensional regimen of the southern extension of the Basin and Range (BR) province. The source area of the largest event was estimated to have a radius of 0.5 km, which corresponds to a normal fault with azimuth of 174° and an almost pure dip slip. Peak ground acceleration (PGA) was close to 100 cm s−2 in the horizontal direction. Shallow earthquakes induced by crustal faulting present a potential seismic risk and hazard within the MVB, considering the population growth. Thus, the necessity to enrich seismic information in this zone is very important since the risk at most urban sites in the region might even be greater than that posed by subduction earthquakes.
نوع الوثيقة: article
وصف الملف: electronic resource
اللغة: English
تدمد: 1561-8633
1684-9981
Relation: http://www.nat-hazards-earth-syst-sci.net/13/2521/2013/nhess-13-2521-2013.pdf; https://doaj.org/toc/1561-8633; https://doaj.org/toc/1684-9981
DOI: 10.5194/nhess-13-2521-2013
URL الوصول: https://doaj.org/article/ab2128fb96d548469d11d5c8962dfc6b
رقم الأكسشن: edsdoj.b2128fb96d548469d11d5c8962dfc6b
قاعدة البيانات: Directory of Open Access Journals
الوصف
تدمد:15618633
16849981
DOI:10.5194/nhess-13-2521-2013