Tsunami resonance in the bay of Concepcion, Chile

Rafael Aránguiz, Mauricio Villagrán, Miguel Esteban, Tomoya Shibayama

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    1 Citation (Scopus)

    Abstract

    Natural oscillation modes of the Bay of Concepcion are determined by means of Empirical Orthogonal Functions. Simulations of the 2010 and 1960 tsunamis were performed using 4 nested grids of 120, 30, 6 and 1″ arc resolution with the NEOWAVE model. In addition, a spectral analysis of tsunami waveforms at both the continental shelf and inside the Bay of Concepcion was performed, and the results were contrasted with natural oscillation periods. The results showed that the natural oscillation period of the first, second and third modes of the Bay were found to be 95, 37 and 32 min. It was found that large tsunami amplifications at the southern shore of the Bay of Concepcion were due to tsunami resonance and coupling between the shelf resonance and bay oscillations. Large inundations heights during 2010 tsunami were caused by the tsunami exciting the fundamental oscillation mode of the Bay. The relative low inundation during the 1960 tsunami was due to the tsunami exciting the higher frequency.

    Original languageEnglish
    Title of host publicationProceedings of the Coastal Engineering Conference
    PublisherAmerican Society of Civil Engineers (ASCE)
    Volume2014-January
    ISBN (Print)9780989661126
    Publication statusPublished - 2014
    Event34th International Conference on Coastal Engineering, ICCE 2014 - Seoul, Korea, Republic of
    Duration: 2014 Jun 152014 Jun 20

    Other

    Other34th International Conference on Coastal Engineering, ICCE 2014
    CountryKorea, Republic of
    CitySeoul
    Period14/6/1514/6/20

    Keywords

    • 1960 tsunami
    • 2010 tsunami
    • Bay of Concepción
    • Fundamental mode
    • Shelf resonance
    • Tsunami resonance

    ASJC Scopus subject areas

    • Civil and Structural Engineering
    • Ocean Engineering
    • Oceanography

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  • Cite this

    Aránguiz, R., Villagrán, M., Esteban, M., & Shibayama, T. (2014). Tsunami resonance in the bay of Concepcion, Chile. In Proceedings of the Coastal Engineering Conference (Vol. 2014-January). American Society of Civil Engineers (ASCE).