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Tomotaka IWATA, Dr. Sc.
D.Sc. in Geophysics
Graduate School of Science, Kyoto University (1989.3)
M.Sc. in Geophysics
Graduate School of Science, Kyoto University (1983.3)
B.Sc. in Geophysics
Faculty of Science, Kyoto University (1981.3)
Disaster Prevention Research Institute, Kyoto University (2004.11-present)
Disaster Prevention Research Institute, Kyoto University (1989.7-2004.10)
JSPS Postdoctoral Fellow
Disaster Prevention Research Institute, Kyoto University (1989.4-1989.6)
Strong motion seismology
Earthquake source process
Source characterization for strong motion prediction
Modeling of subsurface structure for strong motion simulation
Long period ground motion from large earthquakes
Kubo, H., K. Asano, T. Iwata, and S. Aoi (2016).
Development of fully Bayesian multiple-time-window source inversion, Geophys. J. Int., 204, 1601-1619.
Asano, K., H. Sekiguchi, T. Iwata, M. Yoshimi, T. Hayashida, H. Saomoto, and H. Horikawa (2016).
Modelling of wave propagation and attenuation in the Osaka sedimentary basin, western Japan, during the 2013 Awaji Island earthquake, Geophys. J. Int., 204, 1678-1694.
Maufroy, E., E. Chaljub, F. Hollender, J. Kristek, P. Moczo, P. Klin, E. Priolo, A. Iwaki, T. Iwata, V. Etienne, F. De Martin, N. Theodoulidis, M. Manakou, C. Guyonnet-Benaize, K. Pitilakis, P.-Y. Bard (2015).
Earthquake ground motion in the Mygdonian basin, Greece: The E2VP verification and validation of 3D numerical simulation up to 4 Hz, Bull. Seismol. Soc. Am., 105, 1398-1418.
Kusumoto, S., Y. Itoh, K. Takemura, and T. Iwata (2015).
Displacement Fields of Sedimentary Layers Controlled by Fault Parameters: The Discrete Element Method of Controlling Basement Motions by Dislocation Solutions, Earth Sciences, 4(3), 89-94.
Tanaka, M., K. Asano, T. Iwata, and H. Kubo (2014).
Source rupture process of the 2011 Fukushima-ken Hamadori earthquake: how did the two subparallel faults rupture?, Earth Planets Space, 66, 101, doi:10.1186/1880-5981-66-101.
Somei, K., K. Asano, T. Iwata, and K. Miyakoshi (2014).
Source Scaling of Inland Crustal Earthquake Sequences in Japan Using the S-Wave Coda Spectral Ratio Method, Pure Appl. Geophys., 171, 2747-2766.
Kuriyama, M., H. Sato, and T. Iwata (2013).
Examination of source fault model for the Gifu-Ichinomiya fault based
on the seismic intensity data , Earth Planets Space, 65, 1449-1462.
Kubo, H., K. Asano, and T. Iwata (2013).
Source-Rupture Process of the 2011 Ibaraki-oki, Japan, Earthquake (Mw 7.9) Estimated from the Joint Inversion of Strong-Motion and GPS Data: Relationship with Seamount and Philippine Sea Plate, Geophys. Res. Lett., 40, 3003-3007, doi:10.1002/grl.50558.
Asano, K. and T. Iwata (2012).
Source model for strong ground motion generation in the frequency range
0.1-10 Hz during the 2011 Tohoku earthquake, Earth Planets Space, 64,
Kuriyama, M. and T. Iwata (2011).
Examination of source-model construction methodology for strong ground-motion
simulation of multi-segment rupture during 1891 Nobi earthquake,
Earth Planets Space, 63, 71-88.
Iwaki, A. and T. Iwata (2011).
Estimation of three-dimensional boundary shape of the Osaka sedimentary
basin by waveform inversion, Geophys. J. Int., 186, 1255-1278.
Asano, K. and T. Iwata (2011).
Source Rupture Process of the 2007 Noto Hanto, Japan, Earthquake
Estimated by the Joint Inversion of Strong Motion and GPS Data,
Bull. Seism. Soc. Am., 101, 2467-2480.
Asano, K. and T. Iwata (2011).
Characterization of Stress Drops on Asperities Estimated from the
Heterogeneous Kinematic Slip Model for Strong Motion Prediction for
Inland Crustal Earthquakes in Japan, Pure Appl. Geophys., 168, 105-116.
Iwata, T. and K. Asano (2011).
Characterization of the Heterogeneous Source Model of Intraslab Earthquakes toward Strong Ground Motion Prediction,
Pure Appl. Geophys., 168, 117-124. .
Petukhin, A., T. Iwata, and T. Kagawa (2010).
Study on the effect of the oceanic water layer on the strong ground motion simulation, Earth Planets Space, 62, 621-630.
Tobita, T., S. Iai, and T. Iwata (2010).
Numerical Analysis of Near-Field Asymmetric Vertical Motion, Bull. Seism. Soc. Am., 100, 1456-1469.
Zhang, W., T. Iwata, and K. Irikura (2010).
Dynamic simulation of the 1999 Chi-Chi, Taiwan, earthquake, J. Geophys. Res., 115, B04305, doi:10.1029/2008JB006201.
Asano, K. and T. Iwata (2010).
Characterization of Stress Drop on Asperity Estimated from Heterogeneous Kinematic Slip Model for Strong Motion Prediction of Inland Crustal Earthquake in Japan, Pure Appl. Geophys., accepted.
Iwata, T. and K. Asano (2010).
Characterization of Heterogeneous Source Model of Intraslab Earthquakes toward Strong Ground Motion Prediction, Pure Appl. Geophys., accepted.
Iwaki, A. and T. Iwata (2010).
Simulation of long-period ground motion in the Osaka sedimentary basin: performance estimation and the basin structure effects, Geophys. J. Int., 181, 1062-1076.
Asano, K. and T. Iwata (2009).
Source rupture process of the 2004 Chuetsu, Mid-Niigata prefecture, Japan, earthquake inferred from waveform inversion with dense strong-motion data, Bull. Seism. Soc. Am., 99, 123-140.
Iwaki, A. and T. Iwata (2008).
Validation of 3D basin structure models for long-period ground motion simulation in the Osaka basin, western Japan, J. Seism., 12, 197-215.
Iwata, T., T. Kagawa, A. Petukhin, and Y. Onishi (2008).
Basin and crustal velocity structure models for the simulation of strong ground motions in the Kinki area, Japan, J. Seism., 12, 223-234.
Iwata, T., K. Asano, M. Kuriyama, and A. Iwaki (2008).
Non-linear site response characteristics of K-NET ISK005 station and relation to the earthquake disaster during the 2007 Noto-Hanto earthquake, central Japan, Proc. 14 World Conf. Earthq. Eng., paper no. 01-1026.
Suzuki, W. and T. Iwata (2007).
Source model of the 2005 Miyagi-Oki, Japan, earthquake estimated from broadband strong motions, Earth Planets Space, 59, 1155-1171.
Asano, K., T. Iwata, and K. Irikura (2005)
Estimation of Source Rupture Process and Strong Ground Motion Simulation of the 2002 Denali, Alaska, Earthquake,
Bull. Seism. Soc. Am., 95, 1701-1715.
Suzuki, W., T. Iwata, K. Asano, and N. Yamada (2005)
Estimation of the source model for the foreshock of the 2004 off the Kii peninsula earthquakes and strong ground motion simulation of the hypothetical Tonankai earthquake using the empirical Green's function method, Earth Planets Space, 57, 345-350. link
Yamada, N. and T. Iwata (2005)
Long-period ground motion simulation in the Kinki area during the MJ 7.1 foreshock of the 2004
off the Kii peninsula earthquakes,
Earth Planets Space, 57, 197-202.
Iwata, T., H. Sekiguchi, H. Miyake, W. Zhang, and K. Miyakoshi (2006)
Dynamic source parameters for charactrized source model for strong motion prediction,
Proc. International Sympo. on Earthq. Eng. Commemorating Tenth Anniversary of the 1995 Kobe earthquake,
Iwata, T. and H. Miyake (2004),
Ground motion simulation during a scenario earthquake
based on the strong motion prediction recipe
- In case of the northern part of the Biwako-Seigan faults as a hypothetical source fault -,
J. Japan Soc. Natural Disas. Sci., 23, 259-271 (in Japanese with English abstract).
link to PDF (1.9MB)
Miyake, H., T. Iwata, and K. Irikura (2003),
Source characterization for broadband ground-motion simulation:
Kinematic heterogeneous source model and strong motion generation area, Bull. Seism. Soc. Am.,