Large-scale numerical modeling of hydro-acoustic waves generated by tsunamigenic earthquakes
Tsunamigenic fast movements of the seabed generate pressure waves in weakly compressible seawater, namely hydro-acoustic waves, which travel at the sound celerity in water (about 1500 m s<sup>−1</sup>). These waves travel much faster than the counterpart long free-surface gravity waves a...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Copernicus Publications
2015-03-01
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| Series: | Natural Hazards and Earth System Sciences |
| Online Access: | http://www.nat-hazards-earth-syst-sci.net/15/627/2015/nhess-15-627-2015.pdf |
| Summary: | Tsunamigenic fast movements of the seabed generate pressure waves in weakly
compressible seawater, namely hydro-acoustic waves, which travel at the
sound celerity in water (about 1500 m s<sup>−1</sup>). These waves travel much
faster than the counterpart long free-surface gravity waves and contain
significant information on the source. Measurement of hydro-acoustic waves
can therefore anticipate the tsunami arrival and significantly improve the
capability of tsunami early warning systems. In this paper a novel numerical
model for reproduction of hydro-acoustic waves is applied to analyze the
generation and propagation in real bathymetry of these pressure perturbations
for two historical catastrophic earthquake scenarios in Mediterranean Sea.
The model is based on the solution of a depth-integrated equation, and
therefore results are computationally efficient in reconstructing the
hydro-acoustic waves propagation scenarios. |
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| ISSN: | 1561-8633 1684-9981 |