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IUGG XXIV General Assembly July 2-13, 2007 Perugia, Italy<br />

(S) - <strong>IASPEI</strong> - International Association of Seismology and Physics of the Earth's<br />

Interior<br />

JSS002 Poster presentation 1831<br />

Global Tsunami Deposits Dtabase<br />

Mrs. Vinita Ruth Brocko<br />

<strong>IASPEI</strong><br />

Paula K. Dunbar<br />

Historical tsunami and tsunami deposit data are important for assessing the tsunami hazard of a region.<br />

The past record provides clues to what might happen in the future, such as frequency of occurrence<br />

and maximum wave heights. Instrumental and even written records often do not span enough time to<br />

assess the full range of a regions tsunami hazards. Tsunamis have been reported since ancient times,<br />

but without mechanical, digital or human observation, all that remain of tsunamis occurring before<br />

records were kept are the deposits they have left behind. Historical events for which deposits have been<br />

studied provide criteria for identifying tsunami in the geologic record (ground truth for the modelers and<br />

photogrammetrically-inclined). A comprehensive database of historical tsunami events and their effects<br />

has been in progress for decades, continued by present work at NGDC. Beginning with a massive<br />

literature search undertaken by colleagues at the University of Hawaii, we extend the record of tsunami<br />

backward in time by developing a new database, one of tsunami deposit locations, their estimated age<br />

and descriptions of the deposits themselves. Events known only by proxy information are included, but<br />

flagged to highlight the absence of a physical deposit. Sort by any populated field, including event,<br />

location, region, age of deposit, author, publication type (extract information from peer reviewed<br />

publications only, if you wish), grain size, composition, presence/absence of plant material, etc. Use the<br />

GTDD to find tsunami deposit references for a given location, event or author; previous work published<br />

in your field area; deposits similar to your field area; of potential collaborators. You may also download<br />

public domain documents pertinent to tsunami deposits.<br />

Keywords: paleotsunami, tsunami deposits, global database

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