In this study, a preliminary broadband
source model for the 2014 Papanoa, Mexico, earthquake (Mw=7.3) was obtained
through the empirical Green’s function method. This source model is composed of
one Strong Motion Generation Area (SMGA), with a size of 121 km2. The waveforms
of a small earthquake of magnitude Mw=5.1 which occurred in 2010, in the same
region, and with a similar focal mechanism solution, were used to obtain
synthetic time series for the mainshock. To estimate the simulation parameters
N and C, source spectral ratios with broadband and strong motion data were
used. Using those parameters, the position and the size of the SMGA were
determined. The obtained SMGA seems to correspond to one of the large slip area
of the inversion models derived with teleseismic data. The relationship of the
size of SMGA and seismic moment of this event almost coincides to the empirical
relationships obtained the previous study for the subduction earthquakes.
Keywords: subduction earthquake, the
empirical Green’s function method, the 2014 Papanoa, Mexico, earthquake, strong
motion generation area