Corner Frequency 2
Corner Frequency 2 : The frequency at which the curve representing the Fourier amplitude spectrum of a recorded seismic signal abruptly changes its slope and drops by -3 db from the spectral plateau. In earthquake source studies, a parameter characterizing the far- field body-wave displacement "source spectrum", being related to fault size, rupture velocity, source duration and stress drop in the source. See omega-squared model, Fig. 3.5 in Chapter 3 of this Manual, and Figure 7 and Eq (6.1) in Ben-Zion (2003). In seismometry the frequency at which the transfer function, respectively magnification curve of a recording system changes its slope and drops by -3 dB from its plateau (maximum) level. See: Figures in IS 5.2 in this Manual, also bandwidth and bandpass-filter)
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