The region around Acapulco, on the Pacific coast of Mexico, is subjected to large seismic risk. This paper presents a contribution to improve microzonation of this region. We investigated site effects using three basic sources of data: strong-motion records from all of the instruments that have operated within the area; weak-motion records obtained from the installation and operation of a temporal, digital, seismograph network; and measurements of microtremors at 35 sites. We compared and evaluated different techniques of data analysis. We show that very coherent results are obtained from different kinds of measurement, and that microtremor records are very useful to interpolate sparse earthquake data. We propose two maps that reflect the fundamental characteristics of site effects in the area: dominant period and maximum relative amplification. These maps may be used to improve current microzonation of Acapulco.

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Entre el 5 y 15 de marzo de 1991 se instaló una red de sismógrafos digitales de tres componentes para registrar la actividad sísmica asociada al Volcán de Colima. Estos eventos fueron clasificados por su forma de onda y/o por observaciones directas en campo. Con el objeto de caracterizarlos por su frecuencia dominante se estimaron sus espectros de Fourier, tomando en cuenta el efecto de sitio de las estaciones. Cuatro tipos diferentes de eventos fueron observados: Eventos tipo B de alta y baja frecuencia, tremores armónicos y tremores de avalancha. El tipo B-Alta frecuencia presenta un máximo en 5 Hz. El pico dominante para el tipo B-Baja frecuencia es aproximadamente de 2 Hz que tiene una forma espectral característica y bien definida. La frecuencia dominante de los tremores armónicos varia de 3 a 5 Hz, presentando una forma espectral muy característica compuesta de dos máximos estrechos. El segundo pico de menor amplitud guarda una relación del doble de la frecuencia dominante del primero. Finalmente los tremores de avalancha muestran también una forma espectral característica compuesta de un solo máximo en 3 Hz.

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The incorporation of wind generation introduces challenges to the operation of the power system due to its uncertain characteristics. Therefore, the development of methods to accurately model the uncertainty is necessary. In this paper, the spatio-temporal Kriging and analog approaches are used to forecast wind power generation and used as input to solve an economic dispatch problem, considering the uncertainties of wind generation. Spatio-temporal Kriging takes into account the spatial and temporal information given by the database to enhance wind forecasts. We evaluate the performance of using the spatio-temporal Kriging, and comparisons are carried out versus other approaches in the framework of the economic power dispatch problem, for which simulations are developed on the modified IEEE 3-bus and IEEE 24-bus test systems. The results show that the use of Kriging-based spatio-temporal models in the context of economic power dispatch can provide an opportunity for lower operating costs in the presence of uncertainty when compared to other approaches.