Last Update 11/06 2014
Through numerical simulations using laboratory-derived friction laws, I investigate the mechanical process of seismic and aseismic sliding process on plate boundaries to understand the variation of seismic coupling, crustal deformation, and seismicity. Specific research interests are as follows: (1) Development of constitutive friction laws. (2) Effects of stresses due to aseismic sliding on seismic activity. (3) Aseismic sliding preceding earthquakes. (4) Effects of fault interaction on seismic cycles.
N. Kato, and T. E. Tullis, A composite rate- and state-dependent law for rock friction, Geophys. Res. Lett., 28, 1103--1106, 2001.
N. Kato, A possible model for large preseismic slip on a deeper extension of a seismic rupture plane, Earth Planet. Sci. Lett., 216, 1/2, 17--25, 2003.
Kato, N., Interaction of slip on asperities: Numerical simulation of seismic cycles on a two-dimensional planar fault with nonuniform frictional property, J. Geophys. Res., 109, B12306, doi:10.1029/2004JB003001, , 2004.
Kato, N., How frictional properties lead to either rupture front focusing or cracklike behavior, Bull. Seism. Soc. Am., 97, 6, 2182--2189, 2007.
Kato, N., Numerical simulation of recurrence of asperity rupture in the Sanriku region, northeastern Japan, J. Geophys. Res., 133, B06302, doi:10.1029/2007JB005515, , 2008.
Kato, N. and S. Yoshida, A shallow strong patch model for the 2011 great Tohoku-oki earthquake: A numerical simulation, Geophys. Res. Lett., 38, L00G04, doi:10.1029/2011GL048565, , 2011.
Kato, N., Dependence of earthquake stress drop on critical slip-weakening distance, J. Geophys. Res., 117, B01301, doi:10.1029/2011JB008359, , 2012.
Kato, N., Fracture energies at the rupture nucleation points of large interplate earthquakes, Earth Planet. Sci. Lett., 353-354, 190--197, 2012.
Kato, N., Deterministic chaos in a simulated sequence of slip events on a single isolated asperity, Geophys. J. Int., , 2014 (in p.