Modeling of Strong Motion Generation Areas of the 2011 Tohoku, Japan Earthquake using Modified Semi-Empirical Technique Incorporating Frequency Dependent Radiation pattern
Sandeep ., INDIAN INSTITUTE OF TECHNOLOGY ROORKEE, INDIA, EARTH SCIENCES, Roorkee, India
Contact First Author: Sandeep .; sandeeparora95@gmail.com
Previously Published Material: Yes this kind of finding has been earlier published in Natural Hazards Journal. Still this is a further extended part of the workA. Joshi, Sandeep, Kamal (2014) Modeling of Strong Motion Generation Area of the 2011 Tohoku, Japan earthquake using Modified Semi-Empirical Technique. Nat Hazards 71:587-609. Sandeep, A. Joshi, Kamal, Parveen Kumar, Ashvini Kumar (2014) Effect of frequency dependent radiation pattern in simulation of high frequency ground motion of Tohoku earthquake using modified semi empirical method. Nat Hazards 73:1499-1521This kind of work has already been selected for best poster award at Indian Geophysical Union held on 19-21 November 2014 at Kurukshetra University, Kurukshetra
English Abstract:
Abstract In the present work strong ground motion has been simulated using a modified semi-empirical technique, with frequency dependent radiation pattern model. Joshi et al. (2014) have modified the semi-empirical technique to incorporate the modeling of strong motion generation areas (SMGAs). A frequency dependent radiation pattern model is applied to simulate high frequency ground motion more precisely. Identified SMGAs (Kurahashi and Irikura 2012) of the 2011 Tohoku earthquake (
Mw 9.0) were modeled using this modified technique. Records are simulated for both frequency dependent and constant radiation pattern function. Simulated records for both cases are compared with observed records in terms of peak ground acceleration and pseudo acceleration response spectra at different stations. Comparison of simulated and observed records in terms of root mean square error suggests that the method is capable of simulating record which matches in a wide frequency range for this earthquake and bears realistic appearance in terms of shape and strong motion parameters. The results confirm the efficacy and suitability of rupture model defined by five SMGAs for the developed modified technique.
Keywords Strong ground motion · semi-empirical · strong motion generation area. frequency dependent radiation pattern. 2011 Tohoku Earthquake
