Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/3155
Authors: McCloskey, J.* 
Antonioli, A.* 
Piatanesi, A.* 
Sieh, K.* 
Steacy, S.* 
Nalbant, S.* 
Cocco, M.* 
Giunchi, C.* 
Huang, J. D.* 
Dunlop, P.* 
Title: Near-field propagation of tsunamis from megathrust earthquakes
Journal: Geophysical Research Letters 
Series/Report no.: /34(2007)
Publisher: AGU
Issue Date: 27-Jul-2007
DOI: 10.1029/2007GL030494
Keywords: Sumatra
earthquake
tsunami
megathrust
hazard
forecasting
Subject Classification04. Solid Earth::04.06. Seismology::04.06.03. Earthquake source and dynamics 
Abstract: We investigate controls on tsunami generation and propagation in the near-field of great megathrust earthquakes using a series of numerical simulations of subduction and tsunamigenesis on the Sumatran forearc. The Sunda megathrust here is advanced in its seismic cycle and may be ready for another great earthquake. We calculate the seafloor displacements and tsunami wave heights for about 100 complex earthquake ruptures whose synthesis was informed by reference to geodetic and stress accumulation studies. Remarkably, results show that, for any near-field location: (1) the timing of tsunami inundation is independent of slipdistribution on the earthquake or even of its magnitude, and (2) the maximum wave height is directly proportional to the vertical coseismic displacement experienced at that location. Both observations are explained by the dominance of long wavelength crustal flexure in near-field tsunamigenesis. The results show, for the first time, that a single estimate of vertical coseismic displacement might provide a reliable short-term forecast of the maximum height of tsunami waves.
Appears in Collections:Article published / in press

Files in This Item:
File Description SizeFormat Existing users please Login
2007GL030494.pdfmain article408.24 kBAdobe PDF
article_text_and_figure.pdfunformatted final version868.92 kBAdobe PDFView/Open
Show full item record

WEB OF SCIENCETM
Citations 50

19
checked on Feb 10, 2021

Page view(s) 50

412
checked on Mar 16, 2024

Download(s) 20

303
checked on Mar 16, 2024

Google ScholarTM

Check

Altmetric