期刊
GEOPHYSICAL JOURNAL INTERNATIONAL
卷 223, 期 1, 页码 632-647出版社
OXFORD UNIV PRESS
DOI: 10.1093/gji/ggaa334
关键词
Tsunami; Pacific Ocean; Numerical modelling; Earthquake hazards
This paper explores the effects on tsunami simulations of the level of detail of the bathymetric grid in use. For this purpose, we expand available bathymetric data sets of the Pacific Basin in spherical harmonics. For realistic scenarios of tsunamis generated by earthquake dislocations, we conclude that an expansion to a maximum degree l(max) = 40, corresponding to wavelengths of 1000 km, is sufficient to reproduce the main features of the tsunami wavefield synthesized in deep water, that is, without considering final shoaling and interaction with coastal features.
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