A comparative analysis of the quality factor Q for the regions of Guerrero and Oaxaca, México
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Estimaciones del factor de calidad Q. de las ondas S reportadas para las regiones de Oaxaca y Guerrero, México, muestran que la atenuación en Oaxaca es entre 3.7 y 5.0 veces mayor comparada con la de Guerrero en la banda de frecuencias de 1 a 30 Hz. Esta importante diferencia en la atenuación de estas regiones vecinas no puede ser completamente explicada por las características petrológicas de estas regiones. Cuando los valores de Q. observados en Oaxaca y Guerrero se comparan con otros parámetros, tales como la edad de las rocas y el flujo de calor, resulta que la atenuación en Oaxaca es mayor de lo esperado en relación con Guerrero. Esto sugiere que el mecanismo mas viable para explicar las diferencias de Q. observadas puede relacionarse con el estado de esfuerzos prevalentes cuando los valores de Qs fueron medidos. Los altos valores de Q5 estimados para Guerrero pueden ser el resultado del esfuerzo tectónico acumulado en esta region y a que la corteza esta posiblemente menos fracturada que en Oaxaca.
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