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2.39
Joyner and Boore
(
1982b
) &
Joyner and Boore
(
1988
)
Groundmotion model is:
where
y
is in
g
,
β
= 0
.
23
,
γ
= 0
,
p
= 1
,
b
=

0
.
0027
,
c
= 0
,
h
= 8
.
0
and
σ
= 0
.
28
and for randomly oriented component
α
= 0
.
43
and for larger component
α
= 0
.
49
.
Use same data and method as
Joyner and Boore
(
1981
), see Section
2.37
, for PGA.
Use data from shallow earthquakes, defined as those for which fault rupture lies mainly above a depth of
20
km
.
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