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A brief frequency analysis of various types of volcanic microearthquakes

Abstract:

The seismic behavior of volcanoes in the Andean mountain range plays an important role in improving detection, classification and possible early warning systems; in this article, a study of the frequency bands of the main types of volcanic microearthquakes of the Cotopaxi (Ecuador) and Llaima (Chile) volcanoes is made, and the determined frequency bands are compared with the bands presented in the literature. Two databases were used to determine the frequency bands, and the Welch periodogram and a study with histograms of the principal components in frequency were used. Additionally, the analysis with decision trees (machine learning) of the frequency bands is proposed to determine the starting and ending points in frequency of the different types of microearthquakes events.