Abstract
Natural oscillation modes of the Bay of Concepcion are determined by means of Empirical Orthogonal Functions. Simulations of the 2010 and 1960 tsunamis were performed using 4 nested grids of 120, 30, 6 and 1″ arc resolution with the NEOWAVE model. In addition, a spectral analysis of tsunami waveforms at both the continental shelf and inside the Bay of Concepcion was performed, and the results were contrasted with natural oscillation periods. The results showed that the natural oscillation period of the first, second and third modes of the Bay were found to be 95, 37 and 32 min. It was found that large tsunami amplifications at the southern shore of the Bay of Concepcion were due to tsunami resonance and coupling between the shelf resonance and bay oscillations. Large inundations heights during 2010 tsunami were caused by the tsunami exciting the fundamental oscillation mode of the Bay. The relative low inundation during the 1960 tsunami was due to the tsunami exciting the higher frequency.
| Original language | English |
|---|---|
| Title of host publication | Proceedings of the Coastal Engineering Conference |
| Publisher | American Society of Civil Engineers (ASCE) |
| Volume | 2014-January |
| ISBN (Print) | 9780989661126 |
| Publication status | Published - 2014 |
| Event | 34th International Conference on Coastal Engineering, ICCE 2014 - Seoul, Korea, Republic of Duration: 2014 Jun 15 → 2014 Jun 20 |
Other
| Other | 34th International Conference on Coastal Engineering, ICCE 2014 |
|---|---|
| Country | Korea, Republic of |
| City | Seoul |
| Period | 14/6/15 → 14/6/20 |
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Keywords
- 1960 tsunami
- 2010 tsunami
- Bay of Concepción
- Fundamental mode
- Shelf resonance
- Tsunami resonance
ASJC Scopus subject areas
- Civil and Structural Engineering
- Ocean Engineering
- Oceanography
Cite this
Tsunami resonance in the bay of Concepcion, Chile. / Aránguiz, Rafael; Villagrán, Mauricio; Esteban, Miguel; Shibayama, Tomoya.
Proceedings of the Coastal Engineering Conference. Vol. 2014-January American Society of Civil Engineers (ASCE), 2014.Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
}
TY - GEN
T1 - Tsunami resonance in the bay of Concepcion, Chile
AU - Aránguiz, Rafael
AU - Villagrán, Mauricio
AU - Esteban, Miguel
AU - Shibayama, Tomoya
PY - 2014
Y1 - 2014
N2 - Natural oscillation modes of the Bay of Concepcion are determined by means of Empirical Orthogonal Functions. Simulations of the 2010 and 1960 tsunamis were performed using 4 nested grids of 120, 30, 6 and 1″ arc resolution with the NEOWAVE model. In addition, a spectral analysis of tsunami waveforms at both the continental shelf and inside the Bay of Concepcion was performed, and the results were contrasted with natural oscillation periods. The results showed that the natural oscillation period of the first, second and third modes of the Bay were found to be 95, 37 and 32 min. It was found that large tsunami amplifications at the southern shore of the Bay of Concepcion were due to tsunami resonance and coupling between the shelf resonance and bay oscillations. Large inundations heights during 2010 tsunami were caused by the tsunami exciting the fundamental oscillation mode of the Bay. The relative low inundation during the 1960 tsunami was due to the tsunami exciting the higher frequency.
AB - Natural oscillation modes of the Bay of Concepcion are determined by means of Empirical Orthogonal Functions. Simulations of the 2010 and 1960 tsunamis were performed using 4 nested grids of 120, 30, 6 and 1″ arc resolution with the NEOWAVE model. In addition, a spectral analysis of tsunami waveforms at both the continental shelf and inside the Bay of Concepcion was performed, and the results were contrasted with natural oscillation periods. The results showed that the natural oscillation period of the first, second and third modes of the Bay were found to be 95, 37 and 32 min. It was found that large tsunami amplifications at the southern shore of the Bay of Concepcion were due to tsunami resonance and coupling between the shelf resonance and bay oscillations. Large inundations heights during 2010 tsunami were caused by the tsunami exciting the fundamental oscillation mode of the Bay. The relative low inundation during the 1960 tsunami was due to the tsunami exciting the higher frequency.
KW - 1960 tsunami
KW - 2010 tsunami
KW - Bay of Concepción
KW - Fundamental mode
KW - Shelf resonance
KW - Tsunami resonance
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M3 - Conference contribution
SN - 9780989661126
VL - 2014-January
BT - Proceedings of the Coastal Engineering Conference
PB - American Society of Civil Engineers (ASCE)
ER -