Abstract
We have calculated broadband synthetic seismograms for March 11, 2011 Tohoku earthquakes using the Spectral-Element Method. We use finite source models by using a set of sub-events distributed along the fault surface, retrieved by inversion of body waves (Nakamura et al., 2010). The finite source model used in this simulation estimates Mw to be 9.1. The fault dimension is 460 km times 240 km with the source duration time of 150 s. We use the Earth Simulator2 of JAMSTEC to calculate preliminary synthetic seismograms for this finite source model. We used 726 processors of the Earth Simulator 2, which should provide synthetic seismograms that are accurate up to about 5 s and longer. The comparison of the synthetic seismograms with the observation for this event shows that synthetic P-waveforms model the observed seismogram quite well, reflecting that the finite source model is quite precise. This source model shows that the maximum slip occurs at depth of 20 km and propagates to shallower region, which is consistent with the fact that the tsunami excitation was significant for this event. Azimuthal dependence of misfits of synthetic waveforms and observation, especially for surface waves, may reflect the discrepancies of three-dimensional mantle structure used in this simulation with the actual Earth.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
References
M. Kikuchi, H. Kanamori, Inversion of complex body waves. III. Bull. Seismol. Soc. Am. 81, 2335 (1991).
M. Kikuchi, H. Kanamori, Note on Teleseismic Body-Wave Inversion Program. http://www.eri.u-tokyo.ac.jp/ETAL/KIKUCHI/ (2003).
T. Nakamura S. Tsuboi, Y. Kaneda, Y. Yamanaka, Rupture process of the 2008 Wenchuan, China earthquake inferred from teleseismic waveform inversion and forward modeling of broadband seismic waves. Tectonophysics. 491, 72 (2010).
B. L. N. Kennet, E. R. Engdahl, Traveltimes for global earthquake location and phase identification. Geophys. J. Int. 105, 429 (1991).
C. L. Lawson, R. J. Hanson, Solving Least Squares Problems, Prentice-Hall, New Jersey, (1974)
K. Koketsu et al., A unified source model for the 2011 Tohoku earthquake. Earth Planet. Sci. Lett. 310, 480 (2011).
S. J. Lee, B. S. Huang, M. Ando, H. C. Chiu, J. H. Wang, Evidence of large scale repeating slip during the 2011 Tohoku-Oki earthquake. Geophys. Res. Lett. 38, L19306 (2011).
D. Komatitsch, J. Ritsema, J. Tromp, The spectral-element method, Beowulf computing, and global seismology. Science 298, 1737 (2002).
S. Tsuboi, D. Komatitsch, C. Ji, J. Tromp, Broadband modelling of the 2002 Denali fault earthquake on the Earth Simulator. Phys. Earth Planet. Inter. 139, 305 (2003).
S. Ozawa et al., Coseismic and postseismic slip of the 2011 magnitude-9 Tohoku-Oki earthquake. Nature 475, 373 (2011).
Author information
Authors and Affiliations
Corresponding author
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2013 Springer-Verlag Berlin Heidelberg
About this paper
Cite this paper
Tsuboi, S., Nakamura, T. (2013). Source Process and Broadband Waveform Modeling of 2011 Tohoku Earthquake Using the Earth Simulator. In: Resch, M., Wang, X., Bez, W., Focht, E., Kobayashi, H. (eds) Sustained Simulation Performance 2012. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-32454-3_9
Download citation
DOI: https://doi.org/10.1007/978-3-642-32454-3_9
Published:
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-642-32453-6
Online ISBN: 978-3-642-32454-3
eBook Packages: Mathematics and StatisticsMathematics and Statistics (R0)