Probabilistic seismic hazard analysis of civil infrastructure - Seismic Risk Analysis and Management of Civil Infrastructure Systems - page 8

10

CASR
M max = 7.75

1

0.1

10 -2

Data ( M W = M L )
log 10 l M = 2.757 - 0.736 M W
Data ( M W = M L + 0.6)
log 10 l M = 3.381 - 0.772 M W

10 -3

3 4 5

Moment magnitude M W

6 7 8

(a)

r jb : Joyner-Boore distance
r epi : Epicentral distance
r rup : Rupture distance
r hypo : Hypocentral distance

North

Strike
φ

Earth surface

Site

r jb

r epi

Epicentre

r rup

Focal
depth
H

Fault boundary
Projected fault
boundary

r hypo

Hypocentre

Dip δ

Fault length L

Fault width W

(b)

1.3 (a) Gutenberg-Richter model for the seismic source zone CASR,
and (b) fi nite-fault model of an extended earthquake source.