COMPARISON OF THREE METHODS TO STUDY THE WAVEFIELD IN

Autores/as

  • Agathe Roullé Instituto de Geofísica, UNAM
  • Francisco J. Chávez-García Instituto de Ingeniería, UNAM

DOI:

https://doi.org/10.18867/ris.73.54

Resumen

El movimiento sísmico observado en el Valle de México es complejo debido a la distancia epicentral, una estructura irregular, efectos de sitio importantes, y la posible presencia de distintos modos de propagación. Estas condiciones dificultan el análisis de datos de arreglos sísmicos.

Hemos evaluado tres métodos para analizar los datos de un nuevo arreglo acelerográfico, instalado en la Colonia Roma: frecuencia-número de onda (f-k) convencional, f-k de alta resolución, y la técnica MUSIC (Multiple Signal Characterization). Las pruebas con datos sintéticos indican que los métodos f-k son más robustos ante señales complejas pero MUSIC tiene mejor resolución y es menos sensible al ruido. MUSIC es una buena alternativa para datos coherentes con pequeños retrasos entre estaciones. Los resultados para datos reales muestran la superioridad del método f-k cuando la coherencia es baja. El campo de ondas incluye ondas difractadas lentas del SO en periodos cortos, y ondas rápidas del epicentro en periodos largos. Nuestras observaciones apoyan la idea de que la gran duración del movimiento sísmico se debe a la interacción entre modos de ondas

superficiales, llegando a distintos tiempos a las estaciones, con la resonancia de la capa de arcilla.

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Citas

Aki, K and P G Richards (1980), Quantitative seismology, theory and methods, W.H. Freeman and Company.

Almendros González, F J (1999), “Análisis de señales sismo-volcánicas mediante técnicas de array”, Ph.D. thesis, Departamento de Física Teórica y del Cosmos de la Universidad de

Granada, Spain.

Barker, J S, M Campillo, F J Sánchez-Sesma, D Jongmans, and S K Singh (1996), “Analysis of wave propagation in the Valley of Mexico from a dense array of seismometers”, Bulletin of the Seismological Society of America, Vol. 86, pp. 1667-1680.

Campillo, M, S K Singh, N Shapiro, J Pacheco, and R B Herrmann (1996), “Crustal structure south of the Mexican Volcanic Belt based on group velocity dispersion”, Geofísica Internacional, Vol. 35, pp. 361-370.

Capon, J (1969), “High-resolution frequency-wavenumber spectrum analysis”, Proceedings of the IEEE, Vol. 57, pp. 1408-1418.

Capon, J (1973), “Signal processing and frequency wavenumber spectrum analysis for a large aperture seismic array”, Methods in Computational Physics, Vol. 13, pp. 1-59.

Cárdenas, M, F J Chávez-García, and A Gusev (1997), “Regional amplification of ground motion in central Mexico. Results from coda magnitude data and preliminary modelling”, Journal of Seismology, Vol. 1, pp. 341-355.

Cárdenas, M, and F J Chávez-García (2003), “Regional path effects on seismic wave propagation in central Mexico”, Bulletin of the Seismological Society of America, Vol. 93, pp. 973-985.

Chávez-García, F J and P Y Bard (1994), “Site effects in Mexico City eight years after the

September 1985 Michoacan earthquakes”, Soil Dynamics & Earthquake Engineering, Vol. 13, pp. 229-247.

Chávez-García, F J, J Ramos-Martínez, and E Romero-Jiménez (1995), “Surface wave dispersión analysis in Mexico City”, Bulletin of the Seismological Society of America, Vol. 85, pp. 1116- 1126.

Chávez-García, F J and E Romero-Jiménez (1998), “Ground motion in Mexico City: contribution of large-scale geologic structure”, The effects of surface geology on seismic motion; Proceedings of the 2nd International Symosium. on the Effects of Surface Geology on Seismic Motion, K. Irikura, K. Kudo, H. Okada, and T. Sasatani (editors.), 1-3 December, Yokohama, A.A. Balkema, Vol. 2, pp. 413-420.

Chávez-García, F J and L Salazar (2002), “Strong motion in central Mexico: a model based on data analysis and simple modeling”, Bulletin of the Seismological Society of America, Vol. 92, pp. 3087-3101.

Cornou, C (2002), “Traitement d’antenne et imagerie sismique dans l’agglomération grenobloise (Alpes françaises): implications pour les effets de site”, Ph.D. thesis, Observatoire de Grenoble et Laboratoire de Géophysique Interne et Tectonophysique, Université Joseph Fourier, France.

Eissler, H, L Astiz, and H Kanamori (1986), “Tectonic setting and source parameters of September 19, 1985 Michoacan, Mexico earthquakes”, Geophysical Research Letters, Vol. 13, pp. 569-572.

Furumura, T and B L N Kennett (1998), “On the nature of regional seismic phases-III. The

influence of crustal heterogeneity on the wavefield for subduction earthquakes: the 1985 Michoacán and 1995 Copala, Guerrero, Mexico earthquakes”, Geophysical Journal International, Vol. 135, pp. 1060-1084.

Goldstein, P and R J Archuleta (1987), “Array analysis of seismic signals”, Geophysical Research Letters, Vol. 14, pp. 13-16.

Goldstein, P and R J Archuleta (1991a), “Deterministic frequency-wavenumber methods and direct measurements of rupture propagation during earthquakes using a dense array: theory and methods”, Journal of Geophysical Research, Vol. 96, pp. 6173-6185.

Goldstein, P and R J Archuleta (1991b), “Deterministic frequency-wavenumber methods and direct measurements of rupture propagation during earthquakes using a dense array: data analysis”, Journal of Geophysical Research, Vol. 96, pp. 6187-6198.

Houston, H and H Kanamori (1986), “Source characteritics of the 1985 Michoacan, Mexico, earthquake at periods of 1 to 30 seconds”, Geophysical Research Letters, Vol. 13, pp. 597-600.

Iida, M (1999), “Excitation of high-frequency surface waves with long duration in the Valley of Mexico”, Journal of Geophysical Research, Vol. 104, pp. 7329-7345.

Marcos, S (1998), Les méthodes à haute résolution: traitement d’antenne et analyse spectrale, Editions Hermès, Paris, 783 pp.

Ordaz, M and S K Singh (1992), “Source spectra and spectral attenuation of seismic waves from Mexican earthquakes, and evidence of amplification in the hill zone of Mexico City”, Bulletin of the Seismological Society of America, Vol. 82, pp. 24-43.

Schmidt, R O (1982), “A signal subspace approach to multiple emitter location and spectral

estimation”, Ph.D. thesis, Stanford University, Stanford, California.

Schmidt, R O (1986), “Multiple Emitter Location and Signal Parameter Estimation”, IEEE

Transactions on antennas and propagation, Vol. AP-34, pp. 276-280.

Singh, S K , E Mena, and R Castro (1988), “Some aspects of the source characteristics and

ground motion amplifications in and near Mexico City from acceleration data of the September, 1985, Michoacan, Mexico earthquakes”, Bulletin of the Seismological Society of America, Vol.78, pp. 451-477.

Singh, S K and M Ordaz (1993), “On the origin of long coda observed in the lake-bed strong motion records of Mexico City”, Bulletin of the Seismological Society of America, Vol. 83, pp. 1298-1306.

Wax, M and T Kailath (1985), “Detection of signals by Information Theoretic Criteria”, IEEE Transactions on acoustics, speech, and signal processing, Vol. ASSP-33, pp. 387-392.

Publicado

2005-07-01

Cómo citar

Roullé, A., & Chávez-García, F. J. (2005). COMPARISON OF THREE METHODS TO STUDY THE WAVEFIELD IN. Revista De Ingeniería Sísmica , (73), 1–25. https://doi.org/10.18867/ris.73.54

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