where Ap is in g, using both horizontal components b1= -1.617, b2= 0.248, b3= -0.5402, b4= -0.00392,
h0= 3.2 and σ = 0.26 and for larger horizontal component b1= -1.507, b2= 0.240, b3= -0.542,
b4= -0.00397, h0= 3.0 and σ = 0.26.
Consider two soil categories but do not model:
Classify sites without regard to depth and shear-wave velocity of deposits.
Most records from W. USA but many from Europe and Middle East.
Focal depths between 2 and 29km.
Records from instruments on ground floor or in basements of buildings and structures up to 3 storeys and
at free-field sites, regardless of topography.
Records baseline corrected and low-pass filtered using elliptic filter.