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Earth, Planets and Space
Fig. 6 | Earth, Planets and Space

Fig. 6

From: Monitoring the instrument response of the high-sensitivity seismograph network in Japan (Hi-net): effects of response changes on seismic interferometry analysis

Fig. 6

Histograms of the natural frequency and damping constant distributions. a Distributions of the vertical components of (a1) the natural frequency f, (a2) the standard deviation of f over 10 years, (a3) the damping constant h, and (a4) the standard deviation of h over 10 years. The values were counted when the value of rr exceeded 0.95. b North–south and c east–west components of the variables in (a)

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