Dynamical parameter analysis of continuous seismic signals of Popocat,petl volcano (Central Mexico): A case of tectonic earthquakes influencing volcanic activity
Por:
Tárraga M., de la Cruz-Reyna S., Mendoza-Rosas A.T., Carniel R., Martínez-Bringas A., García A., Ortiz R.
Publicada:
1 jun 2012
Categoría:
Geophysics
Resumen:
The continuous background seismic activity contains information on the internal state of a volcanic system. Here, we report the influence of major regional tectonic earthquakes (M > 5 in most cases) on such state, reflected as changes in the spectral and dynamical parameters of the volcano continuous seismic data. Although changes do not always occur, analysis of five cases of earthquake-induced variations in the signals recorded at Popocat,petl volcano in central M,xico reveal significant fluctuations following the tectonic earthquakes. External visible volcanic activity, such as small to moderate explosions and ash emissions, were related to those fluctuations. We briefly discuss possible causes of the variations. We conclude that recognition of fluctuations in the dynamical parameters in volcano monitoring seismic signals after tectonic earthquakes, even those located in the far field, hundreds of kilometers away, may provide an additional criterion for eruption forecasting, and for
Filiaciones:
Tárraga M.:
Institute of Earth Sciences Jaume Almera, CSIC, Barcelona, Spain
de la Cruz-Reyna S.:
Univ Nacl Autonoma Mexico, Inst Geofis, Mexico City 04510, DF, Mexico
Mendoza-Rosas A.T.:
Univ Nacl Autonoma Mexico, Inst Geofis, Mexico City 04510, DF, Mexico
Carniel R.:
Univ Nacl Autonoma Mexico, Inst Geofis, Mexico City 04510, DF, Mexico
Martínez-Bringas A.:
Centro Nacional de Prevención de Desastres (CENAPRED), México, Mexico
García A.:
Dep. de Volcanología, Museo Nacional de Ciencias Naturales, CSIC, Madrid, Spain
Ortiz R.:
Dep. de Volcanología, Museo Nacional de Ciencias Naturales, CSIC, Madrid, Spain
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