Seismic Tomography At Popocatepetl Volcano, Mexico
Journal Article: Seismic Tomography At Popocatepetl Volcano, Mexico
AbstractWe performed the first 3D seismic tomography of the Popocatepetl volcano, Mexico, from the inversion of the P-wave arrival times of nearly 1500 earthquakes recorded by up to 11 seismic stations of the permanent CENAPRED-SSN network. We used the Bayesian tomographic algorithm developed by Monteiller et al. (2005) to perform this P-wave travel-time tomography and carefully choose optimal regularization hyper-parameters. Sensitivity tests show that the inversion is correctly constrained under the volcano from - 1 to 4 km depth b.s.l.. At these depths, the optimal tomographic model mainly shows low-velocity volumes surrounded by higher-velocity volumes. Lateral heterogeneity is strong: the variation of the P-wave velocity may reach up to ± 20% of the average value at a given depth. Low-velocity volumes correlate well with results from former geological and geophysical studies.
- Pia Berger, Jean-Luc Got, Carlos Valdes Gonzalez and Vadim Monteiller
- Published Journal
- Journal of Volcanology and Geothermal Research, 2011
- Not Provided
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Pia Berger,Jean-Luc Got,Carlos Valdes Gonzalez,Vadim Monteiller. 2011. Seismic Tomography At Popocatepetl Volcano, Mexico. Journal of Volcanology and Geothermal Research. (!) .