On linear site amplification behavior of crustal and subduction interface earthquakes in Japan: (1) regional effects, (2) best proxy selection

A strong-motion database is compiled from KIK-Net Archive of Japan (kyoshin.bosai.go.jp) with following criteria: shallow crustal and subduction interface events between 2000 and 2016, recorded within 300km and moment magnitude, M-w range is 4.9-7. Time-based average of shear-wave velocity profiles up to different depths 10m (V-S10), 20m (V-S20), 30m (V-S30) and 50m (V-S50) are computed. Only stations with 200