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Table 3 Potential sources of errors for each of the numerical and empirical Green’s functions

From: Rupture process of the main shock of the 2016 Kumamoto earthquake with special reference to damaging ground motions: waveform inversion with empirical Green’s functions

Green’s functions Potential sources of errors Mitigation method
Numerical Green’s functions Uncertainty in the subsurface structure model Tuning of the subsurface structure model using records of small events (e.g., Hikima and Koketsu 2005; Asano and Iwata 2011)
Empirical Green’s functions Errors associated with the allocation of small events to the subfaults The fault plane is divided into two or more parts and different small events are assigned to those parts (e.g., Nozu 2007; Nozu and Irikura 2008)