Modeling of geophysical parameters by a seismic source capable of generating a tsunami off the coast of Pochomil, Nicaragua

Abstract

In this investigation, the geophysical parameters (strike, slip, dip, fault type, stiffness, depth, seismic rupture dynamics, tsunami generation and propagation) of ground motion due to a block-slip earthquake such as the one that occurred in 1992 off the coast of Leon. These parameters are associated with three-dimensional vertical and horizontal time-dependent ground motions of spontaneous dynamic rupture models leading to the generation of a tsunami as a latent threat to the Pochomil coast. For this purpose, the TUNAMI-N2 Code software modified by Yanagisawa (2018) was used, based on the geophysical parameters calculated by the United States Geological Survey (USGS), the Global Centroid-Moment-Tensor Project (GCMT), and Tanioka et al. 2017, with magnitude 7.7 Mw. From the modeling results, the highest amplitude wave generating event was caused by a reverse fault plane, with magnitude 8.0 Mw, stiffness 15 GPa, depth 10 km, dip 80.8°, dip 87.2°, and slip 118°. The wave propagation model generated a height of 14.2 m and an arrival time of 35 minutes.