Civil Engineering Reference
In-Depth Information
8
7
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5
4
1
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10
50
100
500
Closest distance to fault (km)
2.3
Magnitude-distance distribution of the database used for the
development of the Subduction zone GMPE of Atkinson & Boore
(2003).
2.
Subduction zone models must make the distinction between interface
events and intraslab events. The interface events are those that occur
due to relative slip between the subducting plate and the continental
plate above while the intraslab events are associated with ruptures
occurring within the subducting slab itself. The nature of these two types
of events usually dictates that intraslab events are associated with
tensile deformation while the interface events are associated with com-
pressive thrusting.
3.
Because subduction events occur at depth, the various functional terms
that are required for accounting for near-fi eld effects in crustal models
are not required for subduction models.
Ground-motion models for subduction zones are usually based upon
datasets of comparable quality as those in shallow crustal regions. In many
situations this results from both types of events being recorded on the same
networks, e.g., Japan and New Zealand.
2.3
Development of ground-motion prediction
equations (GMPEs)
As noted briefl y in the previous section, ground-motion models developed
for different regions make use of different techniques that refl ect the
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