Development of a Seismic Microzoning Map for Lima City and Callao, Peru
Diana Calderon*, Zenon Aguilar*, Fernando Lazares*,
Silvia Alarcon*, and Selene Quispe**
*Japan Peru Center for Earthquake Engineering and Disaster Mitigation (CISMID), Faculty of Civil Engineering, National University of Engineering, Av. Tupac Amaru No 1150, Lima 25, Peru
**Department of Environmental Science and Technology, Tokyo Institute of Technology, Kanagawa, Japan
The location of Lima city and El Callao in the Pacific coast and the long history of seismic activity were the main reasons to develop a seismic microzoning map. The microzoning study was based on large numbers of geotechnical and geophysical exploration points distributed around the study area. The geotechnical exploration consisted of borehole tests and pits, from which soil samples were taken to the laboratory to determine the soil mechanical characteristics. The geophysical exploration consisted of onepoint microtremor measurements and various methods to estimate the S-wave velocity profile. The results of both, the geotechnical and geophysical exploration were combined to develop a seismic microzoning map for Lima city and El Callao. This map shows five zones, where the zone with the best soil mechanical and dynamic characteristics covers most of the study area.
-  E. Silgado, “Historia de los Sismos más Notables Ocurridos en el Perú (1513-1974),” Instituto de Geología y Minería, Bulletin No. 3, Serie C, Geodinámica e Ingeniería Geológica, Lima, Perú, 1978 (in spanish).
-  N. Pulido, H. Tavera, M. Chlieh, Z. Aguilar, D. Calderon, T. Sekiguchi, S. Nakai, and F. Yamazaki, “Estimation of slip scenarios of mega-thrust earthquakes and strong motion simulations for Central Andes, Peru,” Fall meeting American Geophysical Union (AGU), S33A-2505, 2012.
-  M. Karakouzian, “Geology of Lina,” Environmental & Engineering Geoscience, Vol.3, pp. 55-58, 1997.
-  INGEMMET, “Geology of Lima, Lurín, Chancay and Chosica,” Bull. Geological, Mining and Metallurgical Inst., No.43, 1992 (in Spanish).
-  A. Martinez and F. Porturas, “Geotechnical Maps for Lima-Peru,” Reunión Andina de Seguridad Sísmica, Pontificia Universidad Católica del Perú, 1975 (in Spanish).
-  CISMID, “Study of the Vulnerability and Seismic Risk in 42 districts of Lima and Callao,” Japan – Peru Center for Earthquake Engineering Reseearch and Disaster Mitigation, National University of Engineering, Lima, Peru, 2005 (in Spanish).
-  J.Lermo, M. Rodríguez, and S. K. Singh, “Natural period of sites in the valley of Mexico from microtremor measurements,” Earthquake Spectra, Vol.4, pp. 805-14, 1988.
-  J. Lermo and F. J. Chavez-Garcia, “Are microtremors useful in site response evaluation?,” Bull. Seism. Soc. Am., Vol.83, pp. 1350-1364, 1994.
-  P. Bard, “Microtremor Measurements: A tool for site effect estimation? The effects of Surface Geology on Seismic Motion,” Irikura, Kudo, Okada y Sasatani (Eds), pp. 1251-1279, 1998.
-  Y. Nakamura, “A method for dynamic characteristics estimation of subsurface using microtremors on the ground surface,” Quarterly Report Railway Technology Research Institute, Vol.30, No.3, pp. 25-30, 1989.
-  C. Huamán, “Microzonificación Sísmica de La Punta y El Callao,” Tesis de Grado, Facultad de Ingeniería Civil, Universidad Nacional de Ingeniería, Lima, Perú, 1991 (in Spanish).
-  D. Calderon, T. Sekiguchi, S. Nakai, Z. Aguilar, and F. Lazares, “Study of soil amplification based on microtremor and seismic records in Lima Peru,” Jour. Japan Assoc. Earthq. Eng., Vol.12, No.2, pp. 1-20, 2012.