Sensitivity Analysis of Source Parameters for Earthquake-Generated Distant Tsunamis
Publication: Journal of Waterway, Port, Coastal, and Ocean Engineering
Volume 133, Issue 6
Abstract
This paper presents a sensitivity analysis of the effects of different fault plane parameters on earthquake generated tsunamis in the far field. The parameters studied include the location of epicenter, rake angle, dip angle, strike angle, fault plane dimensions, slip displacement, and focal depth. The study was carried out by applying the verified Cornell COMCOT tsunami model to simulate distant tsunamis generated by earthquakes in three different seismic regions, namely, Japan, Aleutian Islands, and Chile in the Pacific Basin. In this study, each fault plane parameter was varied and its effect on the tsunami wave height at a distant location (Hawaii offshore waters as a case study) was examined. Our results showed that under the same earthquake magnitude, in general, variations within a reasonable range of uncertainty in rake and dip angles, epicenter location, and focal depth do not affect the resulting tsunamis significantly while a variation in the fault dimensions, strike angle, and slip displacement can cause a large change in the wave heights in the far field. The study revealed that the sensitivity of the far field wave height to certain earthquake parameters including the fault plane dimensions, slip displacement, and the strike angle does not always decrease as the distance between the earthquake and the far field increases. These results indicate the importance of accurate earthquake information for accurate tsunami predictions and that even for wave heights in a far field thousands of miles away, the earthquake may not be treated as a simple point source described by its epicenter location and magnitude alone.
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Acknowledgments
This study was partially funded by the NOAA Sea Grant College Program and the Joint Institute for Marine and Atmospheric Research (JIMAR) at the University of Hawaii. It is also funded by the Joint Institute for the Study of the Atmosphere and Ocean (JISAO) at the University of Washington under NOAA Cooperative Agreement No. UNSPECIFIEDNA17RJ1232, Contribution No. UNSPECIFIED1197. This publication is considered as Contribution No. UNSPECIFIED2877 from NOAA/Pacific Marine Environmental Laboratory. The third writer P. L.-F. Liu would like to acknowledge the support from the National Science Foundation, NOAA Sea Grant Program in New York, and the University of Alaska for the development of the Cornell COMCOT tsunami simulation model. Helpful discussions with Dr. Gerald Fryer and Dr. Barry Hirshorn of the Pacific Tsunami Warning Center, Dr. Barbara Keating of the University of Hawaii, Dr. Yong Wei of the NOAA/PMEL Center for Tsunami Research, and Professor Tomoyuki Takahashi of Akita University in Japan are greatly appreciated.NSF
References
Fryer, G. J., Watts, P., and Pratson, L. F. (2004). “Source of the great tsunami of 1 April 1946: A landslide in the upper Aleutian forearc.” Mar. Geol., 203, 201–218.
Geist, E. L. (1999). “Local tsunamis and earthquake source parameters.” Adv. Geophys., 39, 117–198.
Gica, E. (2005). “Risk analysis of coastal flooding due to distant tsunamis.” Ph.D. thesis, Univ. of Hawaii at Mānoa, Honolulu.
Imamura, F. (1996). “Review of tsunami simulation with a finite difference method.” Long-wave runup models, H. Yeh, P. L.-F. Liu, and C. Synolakis, eds., World Scientific, River Edge, N.J., 25–42.
Imamura, F., Shuto, N., and Goto, C. (1988). “Numerical simulations of the transoceanic propagation of tsunamis.” Proc., 6th Congress APD-IAHR, 265–272.
Johnson, J. M. (1999). “Heterogeneous coupling along Alaska-Aleutians as inferred from tsunami, seismic, and geodetic inversions.” Adv. Geophys., 39, 1–110.
Kanamori, H., and Cipar, J. J. (1974). “Focal process of the great Chilean earthquake May 22, 1960.” Phys. Earth Planet. Inter., 9, 128–136.
Liu, P. L.-F., Cho, Y.-S., Briggs, M. J., Kanoglu, U., and Synolakis, C. E. (1995). “Runup of solitary waves on a circular island.” J. Fluid Mech., 302, 259–285.
Liu, P. L.-F., Cho, Y.-S., Yoon, S.-B., and Seo, S.-N. (1994). “Numerical simulations of the 1960 Chilean tsunami propagation and inundation at Hilo, Hawaii.” Recent development in tsunami research, M. I. El-Sabh, ed., Kluwer Academic, Dordrecht, The Netherlands, 99–115.
Liu, P. L.-F., Lynett, P., Fernando, H., Jaffe, B. E., Fritz, H., Higman, B., Morton, R., Goff, J., and Synolakis, C. (2005). “Observations by the international tsunami survey team in Sri Lanka.” Science, 308, 1595.
Liu, P. L.-F., Woo, S.-B., and Cho, Y.-S. (1998). “Computer programs for tsunami propagation and inundation.” Technical Rep., Cornell Univ., Ithaca, N.Y.
Mansinha, L., and Smylie, D. E. (1971). “The displacement fields of inclined faults.” Bull. Seismol. Soc. Am., 61, 1433–1444.
Okal, E. A. (1988). “Seismic parameters controlling far-field tsunami amplitude: A review.” Natural Hazards, 1, 67–96.
Sato, R. (1989). Handbook of earthquake fault parameters in Japan, Kajima Institute Publishing, Kajima, Japan (in Japanese).
Synolakis, C., Liu, P. L.-F., Carrier, G., and Yeh, H. (1997). “Tsunamigenic seafloor deformations.” Science, 278, 598–600.
Titov, V. V., Gonzales, F. I., Bernard, E. N., Eble, M. C., Mofjeld, H. O., Newman, J. C., and Venturato, A. J. (2005). “Real-time forecasting: challenges and solutions.” Natural Hazards, 35, 41–58.
Titov, V. V., Gonzales, F. I., Mofjeld, H. O., and Newman, J. C. (1999). “Offshore forecasting of Alaska-Aleutian subduction zone tsunamis in Hawaii.” NOAA Technical Memorandum No. ERL PMEL-114, NOAA, Seattle.
Titov, V. V., and Synolakis, C. E. (1998). “Numerical modeling of tidal wave runup.” J. Waterway, Port, Coastal, Ocean Eng., 124(4), 157–171.
Wang, X., and Liu, P. L.-F. (2005). “A numerical investigation of Boumerdes-Zemmouri (Algeria) earthquake and tsunami.” Comput. Model. Eng. Sci., 10(2), 171–184.
Wang, X., and Liu, P. L.-F. (2006). “An analysis of 2004 Sumatra earthquake fault plane mechanisms and Indian Ocean tsunami.” J. Hydraul. Res., 44(2), 147–154.
Whiteside, L. S., Dater, D. T., Dunbar, P. K., Racey, S. D., Buhmann, R. W., and Hittelman, A. M. (2000). Earthquake seismicity catalog, Vols. 1 and 2, (CD-ROM), National Geographical Data Center, NOAA, Boulder, Colo.
Zhou, H., Teng, M. H., and Lin, P. (2005). “The Cornell 2D numerical model for long wave runup.” Proc., Joint ASME/ASCE/SES Conf. on Mechanics and Material (McMat-2005) (CD-ROM), Baton Rouge, La.
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Information
Published In
Journal of Waterway, Port, Coastal, and Ocean Engineering
Volume 133 • Issue 6 • November 2007
Pages: 429 - 441
Copyright
© 2007 ASCE.
History
Received: Jul 24, 2006
Accepted: Mar 12, 2007
Published online: Nov 1, 2007
Published in print: Nov 2007
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