“allrfstationlist.dat” contains the list of the used seismic stations. The four columns indicate the name, latitude, longitude, and altitude (m) of each station, respectively. “allrfevent.dat” contains the list of the used teleseismic events. From left to right, the 10 columns indicate the year, month (in number), day, hour, minute, and second of the origin time (Japan Standard Time), and the latitude (from –90 to 90), longitude (from –180 to 180), depth of the hypocenter, and magnitude of each event, respectively. “RFmoho.dat” contains the depth distribution of the Moho determined by our RF analysis. The third column indicates the depth (km) of the Moho at the given latitude (the second column) and longitude (the first column) “Tomo_depth_limited.txt” contains the depth distribution of the lower boundary of a layer with a P-wave velocity of 7.5–7.7 km/s in the model by Ishise et al. (2021), which was assumed as the Moho. The third column indicates its depth (km) at the given latitude (the first column) and longitude (the second column) “crustthickness_tomorf.dat” contains the thickness distribution of the crust of the Philippine Sea Plate determined from the geometry of its upper surface estimated by Hirose et al. (2008a, b) and Nakajima et al. (2009) and the Moho depth distribution shown in RFmoho.dat and Tomo_depth_limited.txt. The third column indicates the thickness (km) of the crust at the given latitude (the second column) and longitude (the first column). “RF” and “tomo” in the fourth column indicate the corresponding thickness determined based on the RF analysis and the model by Ishise et al. (2021), respectively.

{"references": ["Hirose, F., Nakajima, J., & Hasegawa, A. (2008a). Three-dimensional velocity structure and configuration of the Philippine Sea slab in southwestern Japan estimated by double-difference tomography. Journal of Geophysical Research, 113, B09315. https://doi.org/10.1029/2007JB005274", "Hirose, F., Nakajima, J., & Hasegawa, A. (2008b). Three-dimensional velocity structure and configuration of the Philippine Sea slab beneath Kanto district, central Japan, estimated by double-difference tomography. Journal of the Seismological Society of Japan, 60, 123\u2013138. https://doi.org/10.4294/zisin.60.123 (in Japanese with English abstract)", "Ishise, M., Kato, A., Sakai, S., Nakagawa, S., & Hirata, N. (2021). Improved 3-D P wave azimuthal anisotropy structure beneath the Tokyo metropolitan area, Japan: New interpretations of the dual subduction system revealed by seismic anisotropy. Journal of Geophysical Research Solid Earth, 126, e2020JB021194. https://doi.org/10.1029/2020JB021194", "Nakajima, J., Hirose, F., & Hasegawa, A. (2009). Seismotectonics beneath the Tokyo metropolitan area, Japan; Effect of slab-slab contact and overlap on seismicity. Journal of Geophysical Research, 114, B08309. https://doi.org/10.1029/2008JB006101"]}