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| Titel |
Structure and performance of a real-time algorithm to detect tsunami or tsunami-like alert conditions based on sea-level records analysis |
| VerfasserIn |
L. Bressan, S. Tinti |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1561-8633
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| Digitales Dokument |
URL |
| Erschienen |
In: Natural Hazards and Earth System Science ; 11, no. 5 ; Nr. 11, no. 5 (2011-05-19), S.1499-1521 |
| Datensatznummer |
250009427
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| Publikation (Nr.) |
 copernicus.org/nhess-11-1499-2011.pdf |
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| Zusammenfassung |
| The goal of this paper is to present an original real-time algorithm devised
for detection of tsunami or tsunami-like waves we call TEDA (Tsunami Early
Detection Algorithm), and to introduce a methodology to evaluate its
performance. TEDA works on the sea level records of a single station and
implements two distinct modules running concurrently: one to assess the
presence of tsunami waves ("tsunami detection") and the other to identify
high-amplitude long waves ("secure detection"). Both detection methods are
based on continuously updated time functions depending on a number of
parameters that can be varied according to the application. In order to
select the most adequate parameter setting for a given station, a
methodology to evaluate TEDA performance has been devised, that is based on
a number of indicators and that is simple to use. In this paper an example
of TEDA application is given by using data from a tide gauge located at the
Adak Island in Alaska, USA, that resulted in being quite suitable since it
recorded several tsunamis in the last years using the sampling rate of
1 min. |
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