where PGA is in g, Vref= 760m∕s, FNL is the nonlinear site term from Boore and Atkinson (2008);
b1= 1.835, b2= 1.034, b3= -0.252, b5= -1.397, bv= -0.069, h = 9.718 and σ = 0.730 for rock; and
b1= 2.135, b2= 1.008, b3= -0.163, b5= -1.380, bv= -0.133, h = 10.510 and σ = 0.630 for soii.
Use 2 site classes:
NEHRP site classes B and C. 362 ≤ Vs,30≤ 1602m∕s. 220 records. 68 stations.
NEHRP site class D. 175 ≤ Vs,30≤ 359m∕s. 173 records. 42 stations.
Combined classes B and C and did not use data from classes A and E due to lack of data.
Data from earthquakes occuring in NW Anatolia (39.39–41.03N and 26.04–31.73E) between 1999 and 2006
plus 33 records from mainshocks worldwide,
Data from 76 different stations in Turkey and 34 different stations elsewhere.
Select data with PGA > 0.8gal and Mw> 4.0.
Except for Kocaeli (Mw7.4) and Duzce (Mw7.1) earthquakes all Turkish earthquakes have Mw≤ 5.7
hence include data from elsewhere (USA, Japan and Taiwan).
Focal depths of Turkish earthquakes between 4.9 and 18.5km and of foreign earthquakes between 5.5 and
Baseline correct and bandpass filter data with cut-offs of 0.1 and 25Hz.
Most data from 10–200km.
Present residuals w.r.t. Mw, rjb and Vs,30 and find no trends.