- Ground-motion model is:
- Response parameter is acceleration for 5% damping.
- Use data from KiK-Net at hard rock sites with shear-wave velocity V
_{s}≥ 2.0km∕s at surface and/or in borehole. Select records from 161 sites (out of 670 sites of KiK-Net) where spectral ratio between surface and borehole records ≤ 2 at periods > 1s. Note that preferable to use higher velocity (3.0km∕s) but as velocity increases number of available sites rapidly decreases: 43 sites with V_{s}= 2.0–2.2km∕s, 33 with V_{s}= 2.2–2.4, 27 with V_{s}= 2.4–2.6, 31 with V_{s}= 2.6–2.8, 16 with V_{s}= 2.8–3.0, 8 with V_{s}= 3.0–3.2 and 3 with V_{s}> 3.2km∕s. - Select earthquakes based on their magnitudes, horizontal locations and depths and types (crustal, interface and intraslab). Note that geographical distribution is not homogeneous but it covers whole of Japan.
- Focal depths between 8.58 and 222.25km.
- Also derive model using M
_{w}. Find predictions similar so use prefer M_{JMA}for convenience of application in Japan. - Only graphs of coefficients presented.