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Earth, Planets and Space
Fig. 4 | Earth, Planets and Space

Fig. 4

From: Estimation of source, path, and site factors of S waves recorded at the S-net sites in the Japan Trench area using the spectral inversion technique

Fig. 4

Location map of example events and their source spectra obtained from the spectral inversion. a Focal-mechanism plots coincide with the locations of corresponding epicenters, and the colors of the compression parts indicate the corresponding depths to the foci. b Black lines denote the displacement source spectra obtained from the inversion and red lines show the fitted lines using the \({\omega }^{-2}\) source model. The labels, C1, C2, C3 means three crustal events, whose catalog magnitudes are indicated with letter M, respectively. The estimated magnitudes based on the flat level of the \({\omega }^{-2}\) source models are given inside the parentheses. c, d Similar to b, but for the interplate and intraslab earthquakes, respectively. See Table 1 for details about the events

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