Rupture processes of the November 13, 2016 New Zealand Earthquake inferred from teleseismic body-waveform inversion

ABSTRACT

We studied the source and rupture process of the November13, 2016New Zealand Earthquake using the inversion schemes developed by Yagi and Kikuchi (2000) for a fixed fault mechanism (fault mechanism retrieved from USGS solution, strike=219o, dip=38o, rake=128o)to investigate and better understand the co-seismic slip distribution.Source parameters for the main shock are summarized as follows; total seismic moment is equal to Mo=8.814x1020 Nm (Mw=7.9), total source duration is about 100 sec, fault area (S) = 200x40 km2, average dislocation = 3.7 m with a maximum slip of 8.90 m, and stress drop = 3.1 MPa. Analysis results indicate that rupture propagation initiated at depth about 32 km, and propagated to northeast bilaterally about 200 km and the main asperity located around 100 km NE the hypocenter or epicenter. There is a small asperity also located about 30 km SW of the hypocenter with about 3 m maximum displacement. However, obtained results and field observations suggest that different segment on the fault plane should be considered rather than single fault plane.

Authors: Evrim Yavuz, T. Serkan Irmak, Erman Şentürk, Tekin Yeken

Conference: Japan 18th International Conference on Engineering Technology, Computer, Basic Applied Sciences

Date / Location: 25-26 July 2017 / Tokyo-Japan

Cite this paper: Yavuz, E., Irmak, T. S., Şentürk, E., Yeke,n T. (2017) Rupture processes of the November 13, 2016 New Zealand Earthquake inferred from teleseismic body-waveform inversion, Japan 18th International Conference on Engineering Technology, Computer, Basic Applied Sciences, Tokyo, Japonya, 25-26 Temmuz 2017.

Abstract: click...