# Table S3 # Velocity models used in this study # (1) (2) # Vs(km/s) depth(km) # Vs: S-wave velocity # #Alaska # from Eberhart-Phillips et al., JGR, 2006 (Table 1, P.7) # Eberhart-Phillips, D., D. H. Christensen, T. M. Brocher, R. Hansen, N. A. Ruppert, P. J. Haeussler, and G. A. Abers (2006). Imaging the transition from Aleutian subduction to Yakutat collision in central Alaska, with local earthquakes and active source data, J. Geophys. Res. 111, no. B11, B11303. # 2.914 2.0 3.457 6.0 3.629 15.0 3.771 24.0 4.086 33.0 4.497 48.0 4.640 65.0 # # #Aleutian # from Kennett et al., GJI, 1995 (p.122); other ref: Hauksson JGR 1985 # Kennett, B. L. N., E. R. Engdahl, and R. Buland (1995). Constraints on seismic velocities in the Earth from traveltimes, Geophys. J. Int. 122, 108-124. # Hauksson, E. (1985). Structure of the Benioff Zone Beneath the Shumagin Islands, Alaska: Relaocation of Local Earthquakes Using Three-Dimensional Ray Tracing, J. Geophys. Res. 90, no. B1, 635-649. # 3.46 0.0 3.85 20.0 4.48 35.0 4.49 77.5 # #Cascadia # from Aaron Wech. The PNSN's (Pacific Northwest Seismic Network) puget sound velocity model # PNSN tremor website: http://www.pnsn.org/tremor # Wech, A. G., and K. C. Creager (2008). Automated detection and location of Cascadia tremor, Geophys. Res. Lett. 35, 20, doi: 10.1029/2008GL035458. # 3.11778 0.0 3.68360 4.0 3.80485 9.0 3.88568 16.0 3.96074 20.0 4.01270 25.0 4.50346 51.0 4.61894 81.0 # #Nankai # from Bogdan Enescu. NIED (National Research Institute for Earth Science and Disaster Prevention), Japan # NIED website: http://www.bosai.go.jp/e/ # 2.844 0.0 3.012 1.0 3.157 2.0 3.278 3.0 3.375 4.0 3.431 5.0 3.451 6.0 3.471 7.0 3.491 8.0 3.511 9.0 3.531 10.0 3.552 11.0 3.572 12.0 3.593 13.0 3.614 14.0 3.634 15.0 3.657 16.0 3.680 17.0 3.704 18.0 3.729 19.0 3.754 20.0 3.782 21.0 3.803 22.0 3.831 23.0 3.858 24.0 3.885 25.0 3.915 26.0 3.944 27.0 3.974 28.0 4.003 29.0 4.032 30.0 4.059 31.0 4.086 32.0 4.113 33.0 4.140 34.0 4.161 35.0 4.186 36.0 4.210 37.0 4.232 38.0 4.254 39.0 4.274 40.0 4.294 41.0 4.311 42.0 4.329 43.0 4.344 44.0 4.356 45.0 4.367 46.0 4.375 47.0 4.382 48.0 4.388 49.0 4.393 50.0 4.396 51.0 4.399 52.0 4.404 53.0 4.406 54.0 4.409 55.0 4.410 56.0 4.411 57.0 4.413 58.0 4.414 59.0 4.415 60.0 # #New Zealand # Fry et al., GRL, 2011 # Fry, B., K. Chao, S. Bannister, and Z. Peng (2011). Deep tremor beneath the Hikurangi margin in New Zealand triggered by the 2010 Mw 8.8 Chile earthquake, Geophys. Res. Lett. 38, L15306, doi: 10.1029/ 2011GL048319. # 3.30 0.0 3.70 12.0 4.60 33.0 4.90 45.0 # #San Jacinto Fault # Hutton et al., BSSA, 2010 (originla from Kanamori 1977) # Hutton, K., J. Woessner, and E. Hauksson (2010). Earthquake Monitoring in Southern California for Seventy-Seven Years (1932-2008), Bull. Seismol. Soc. Am 100, no. 2, 423-446. # Kanamori, H. (1977). The energy release in great earthquakes, J. Geophys. Res. 82, 2981–2987. # 3.20 0.0 3.60 5.5 3.90 16.0 4.50 32.0 # #Taiwan-south % Southern Central Range of Taiwan # from Tang et al., GRL, 2010 # Tang, C.-C., Z. Peng, K. Chao, C.-H. Chen, and C.-H. Lin (2010). Detecting low-frequency earthquakes within non-volcanic tremor in southern Taiwan triggered by the 2005 Mw 8.6 Nias earthquake, Geophys. Res. Lett. 37, L16307, doi: 10.1029/2010GL043918. # 2.20 0.0 2.93 2.0 3.24 4.0 3.31 6.0 3.31 9.0 3.42 13.0 3.46 17.0 3.50 21.0 3.65 25.0 3.78 30.0 4.02 35.0 4.60 50.0 4.82 70.0 # #Taiwan-north % Northern Central Range of Taiwan # from Wu et al., GJI, 2009 # Wu, Y.-M., J. B. H. Shyu, C.-H. Chang, L. Zhao, M. Nakamura, and S.-K. Hsu (2009). Improved seismic tomography offshore northeastern Taiwan: implications for subduction and collision processes between Taiwan and the southernmost Ryukyu, Geophys. J. Int. 178, no. 2, 1042-1054. # 2.15 0.0 2.65 2.0 2.93 4.0 3.07 6.0 3.32 9.0 3.48 13.0 3.60 17.0 3.75 21.0 3.88 25.0 4.05 30.0 4.25 35.0 4.56 50.0 4.67 70.0