EGU2020-7243
https://doi.org/10.5194/egusphere-egu2020-7243
EGU General Assembly 2020
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.

The rupture process of the Peru intermediate and deep earthquakes

Carolina López Sánchez1, Elisa Buforn1, Maurizio Mattesini1, and Hernando Tavera2
Carolina López Sánchez et al.
  • 1Universidad Complutense, Fac. CC. Fisicas, Geofisica y Meteorlogia, Madrid, Spain (ebufornp@ucm.es)
  • 2Instituto Geofísico del Perú, Lima, Perú

The seismicity of Peru is associated with the subduction process of the Nazca plate under South America and characterized by the occurrence of shallow, intermediate and deep earthquakes. In this study, we focus our attention on the rupture process of earthquakes (Mw>6.0 ) that occurred during the period 2018-2019 at intermediate depth (50<h<200 km) and deep depth (500<h<700 km). Focal mechanisms have been estimated from slip inversion of body waves at teleseismic distances (Kikuchi and Kanamori, 1991). We investigate possible differences in the moment rate functions at different focal depths using our results and those provided by SCARDEC database. Furthermore, an estimation of the radiated seismic energy (ER) was provided from the direct integration of the velocity P wave recorded at teleseismic and regional distances, getting values between 1015 to 1016 J. The data were corrected by geometrical spreading, anelastic attenuation, and free surface effect. These results are interpreted in terms of the seismotectonics of the region

How to cite: López Sánchez, C., Buforn, E., Mattesini, M., and Tavera, H.: The rupture process of the Peru intermediate and deep earthquakes, EGU General Assembly 2020, Online, 4–8 May 2020, EGU2020-7243, https://doi.org/10.5194/egusphere-egu2020-7243, 2020