Response parameter is acceleration for 5% damping.
Data from at 91 dam sites with rock foundations. Most instruments in inspection gallery at lowest
elevation (for concrete dams) and in bottom inspection gallery (for embankment dams). Note that
1.8 ≤ Vp≤ 4.5km∕s for bedrock of many concrete dams and 1.5 ≤ Vp≤ 3.0km∕s for bedrock of
embankment dams, which convert to 0.7 ≤ Vs≤ 1.5km∕s.
Select data from M > 5, de< 200km and focal depth h < 130km.
Most records from h < 60km.
Most records from d < 100km.
Classify earthquakes into three types:
Epicentres located inland at shallow depths. 175 records9.
Epicentres located in ocean with h < 60km. 55 records.
Epicentres located inland with h > 60km. 63 records.
Know fault source mechanism for 12 earthquakes.
Adopt 0.334exp(0.653M) from earlier Japanese study.
Derive coefficients regardless of earthquake type. Then derive correction factors for each earthquake type.
Do not report coefficients only graphs of coefficients against period.
Find good agreement between predicted spectra and observed spectra for two stations that recorded the
magnitude 8.0 Tokati-oki 2003 earthquake.
9The authors also give number of ‘sets’ as 81 for shallow crustal, 29 for inter-plate and 29 for deep intra-slab