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Pure and Applied Geophysics

, Volume 175, Issue 4, pp 1393–1404 | Cite as

Implications on 1 + 1 D Tsunami Runup Modeling due to Time Features of the Earthquake Source

Article

Abstract

The time characteristics of the seismic source are usually neglected in tsunami modeling, due to the difference in the time scale of both processes. Nonetheless, there are just a few analytical studies that intended to explain separately the role of the rise time and the rupture velocity. In this work, we extend an analytical 1 + 1 D solution for the shoreline motion time series, from the static case to the kinematic case, by including both rise time and rupture velocity. Our results show that the static case corresponds to a limit case of null rise time and infinite rupture velocity. Both parameters contribute in shifting the arrival time, but maximum runup may be affected by very slow ruptures and long rise time. Parametric analysis reveals that runup is strictly decreasing with the rise time while is highly amplified in a certain range of slow rupture velocities. For even lower rupture velocities, the tsunami excitation vanishes and for larger, quicker approaches to the instantaneous case.

Keywords

Tsunami seismology runup 

Notes

Acknowledgements

This work was entirely funded by the Programa de Riesgo Sísmico.

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Copyright information

© Springer International Publishing AG, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Department of Geophysics, Faculty of Physical and Mathematical SciencesUniversity of ChileSantiagoChile
  2. 2.National Seismological Center, Faculty of Physical and Mathematical SciencesUniversity of ChileSantiagoChile

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