BIROn - Birkbeck Institutional Research Online

    High-frequency coastal overwash deposits from Phra Thong Island, Thailand

    Gouramanis, C. and Switzer, A.D. and Jankaew, K. and Bristow, Charlie S. and Pham, D.T. and Ildefonso, S.R. (2017) High-frequency coastal overwash deposits from Phra Thong Island, Thailand. Scientific Reports 7 , p. 43742. ISSN 2045-2322.

    [img]
    Preview
    Text
    18924.pdf - Published Version of Record
    Available under License Creative Commons Attribution.

    Download (2MB) | Preview

    Abstract

    The 26th December 2004 Indian Ocean Tsunami (IOT) emanated from an Mw 9.2 earthquake that generated a 1600 km-long rupture along the Sumatran Megathrust and generated tsunami waves up to 30 m high. The IOT directly impacted the Bay of Bengal and east Africa, with over 283,000 people perishing. At the time, this catastrophic event was considered unprecedented and sparked intense investigations to test this claim. It is now believed that four pre-2004 IOT events have occurred in the last 2500 years, recurring every 550 to 700 years. Much of this information comes from Phra Thong Island, Thailand, where a sequence of four stacked sandsheets separated by organic units has been recognised and compared to the 2004 IOT event. Recently, ground-penetrating radar on Phra Thong Island identified a region that could not be explained by the known stratigraphy. The stratigraphy of the area was investigated from auger cores and pits, and several previously-unrecognised sandsheets were identified and compared to the known tsunami sandsheets. The proximity of the newly-recognised sandsheets to the palaeo-coastline of Phra Thong Island does not preclude the impacts of localised storms in sandsheet emplacement or that tsunamigenic earthquake recurrence may have been more frequent in the past.

    Metadata

    Item Type: Article
    School: School of Science > Earth and Planetary Sciences
    Depositing User: Administrator
    Date Deposited: 29 Jun 2017 10:55
    Last Modified: 26 Jun 2020 13:02
    URI: https://eprints.bbk.ac.uk/id/eprint/18924

    Statistics

    Downloads
    Activity Overview
    167Downloads
    116Hits

    Additional statistics are available via IRStats2.

    Archive Staff Only (login required)

    Edit/View Item Edit/View Item