support for form (2)
in the data set.
Model (1) with a = 1,
d = 0, g = b and an additional
r term, is the model chosen by Fukushima
and Tanaka (1990) to model a PGA data set. This additional term represents anelastic
attenuation, as opposed to the traditional log10(
r) term representing the geometrical spreading in
a half space. For our data set the form of Fukushima and Tanaka (1990) gave much
/media/vedurstofan/utgafa/skyrslur/2009/VI_2009_012.pdf