The 2015 Illapel Tsunami Source Recovery by Inversion of DART Tsunami Waveforms Using the R-Solution Method

Tatyana A. Voronina, Vladislav V. Voronin, Vladimir A. Cheverda

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

An approach to recovering an initial tsunami waveform with its application to the 16 September 2015 Illapel tsunami is proposed. The approach is based on inverting the remote measurements of water-level data from the deep-ocean DART buoys without a priori information on a source except for the common information about its spatial localization. The ill-posed inverse problem in question is regularized by means of a least-squares inversion using the truncated singular value decomposition method and the r-solution method. The method proposed suppresses the instability of the numerical solution of the ill-posed problem under consideration. The computational algorithm allows one to find the way to improve the inversion by selecting the most informative set of available observation stations. The method proposed was successfully applied to the 16 September 2015 Illapel tsunami.

Original languageEnglish
Pages (from-to)2985-2993
Number of pages9
JournalPure and Applied Geophysics
Volume176
Issue number7
DOIs
Publication statusPublished - 1 Jul 2019

Keywords

  • ill-posed inverse problem
  • r-solution
  • singular value decomposition
  • Tsunami numerical simulation
  • tsunami waveform inversion

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