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This work describes in detail a data acquisition and processing system for magnetotelluric data. The system is capable of doing real time data processing that is, at the time of acquisition and also uses the remote reference technique to get…

Se realiza un estudio estadístico de cuatro criterios para determinar el orden de un modelo autorregresivo (AR) a ser ajustado a datos de olas oceánicas. Los criterios son: a) mínimo del Error Final de la Predicción (PPE), b) mínimo de…

The proposed method corrects for inhomogeneity in the azimuthal distribution of stations, by fitting the residuals to a cosine function of the azimuth. Early arrivals are assigned greater weights than late arrivals. The weights are optimized experimentally by using data…

The geological characteriscitc of Los Humeros caldera (19°42'N, 97°25'W) suggest that the mechamism of heat transfer is mostly of the conductive type. Assuming this mechanism and the available geological and geophysical data it is possible to compute the temperature field…

The results of a scrutiny of the tidal data accumulated along the west coast of Mexico since 1952 are summarized in this paper. They allow the construction of plausible cotidal charts for the harmonic constituents of the tide; the seasonal…

Preliminary palaeomagnetic results from pyroclastic deposits of a large caldera (Los Humeros) and a small explosion crater (Alchichica) are reported. The data are analyzed in terms of a simple classification scheme based on the directional properties of initial remanent magnetization…

A simple geometric interpretation of Empirical Orthogonal Functions is presented for the case where the first two modes represent a large percentage of the total variance (say, 90%). A geometric representation in two dimensions (a plane), permits a rapid, informative…

Using data from a local seismic network operating in Chiapas, Southern Mexico, in 1979 plus two permanent stations VHO and COM, the geometry of the Benioff zone below 60 km depth was accurately mapped in the Tehuantepec area. The hypocenters…

Deep temperature estimations are important for rheological studies of the crust and also for the planning of deep drill holes. Thermal modeling requires the input of realistic boundary conditions in order to obtain reliable values for the temperature at depth.…