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Fig. 9 | Earth, Planets and Space

Fig. 9

From: Spatio-temporal characteristics of frictional properties on the subducting Pacific Plate off the east of Tohoku district, Japan estimated from stress drops of small earthquakes

Fig. 9

Two examples of spectral ratios with different corner frequencies. Blue and red lines indicate spectral ratios for the source model of Brune (1970) with corner frequencies of 1.6 and 40.0 Hz, and that of Boatwright (1978) with corner frequencies of 2.0 and 30.0 Hz, respectively. These corner frequencies are shown by blue and red arrows. Values of \(R_{r}^{C}M_{0r}\) for models of Brune (1970) and Boatwright (1978) are equal to 10.0 and 7.0, respectively. These two functions give similar spectral ratios for the frequency range from 0.7 to 20.0 Hz, which we used in estimating corner frequencies

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