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Earth, Planets and Space
Fig. 1 | Earth, Planets and Space

Fig. 1

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. 1

Index maps. Left panel: black-filled triangles denote the recording stations on land (KiK-net) and color-filled polygons denote the recording stations on the ocean bottom (S-net). The six segments of the S-net (S1–S6) are denoted by different polygons, with station codes at the start and end of each segment. The short-dashed rectangle indicates the location of sites, namely, S3N26, S3N25, S3N24, S3N23, S3N22, S3N21, S3N20, S3N19, and S6N12 from left to right, respectively, discussed later. The NAM, PHS, and ST are shorthand for the North-American Plate, Philippine Sea Plate, and Sagami Trough, respectively. Right panel: location of the epicenters of earthquakes used in the present study. The depth to the Pacific Plate is marked with contours (thin dashed lines) at interval of 10 km. The 10 km contour coincides roughly with the Trench axes. The plate-depth data were taken from Hirose (2022)

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