Características espectrales de temblores tipo A, tipo B y tremores asociados a la erupción del Volcán Popocatepectl, México, en diciembre de 1994

ABSTRACT

Between December 1st, 1994, and January 30, 1995, 5 digital, Three-component seismographs were installed to record seismic activity associated with Popocatépetl volcano. We describe the records obtained at PPC before, simultaneous with, and after the crisis of December 21, 1994. Site effect amplification at PPC occurs at frequencies larger tham 15 Hz. Therefore, differences in wavw shape and dominant frequencies between Type A and Type-B events may be due to source or path effects. We analyzed the spectra of volcanic tremors and Type-B events before the crisis (AU)