the formulations presented by Der Kiureghian and Ang
(1977). Figure E-2 (diagram a) illustrates the probability
distributions for a fault rupture length of 5 km (3.1 miles);
Figure E-2 (diagram b) illustrates the probability
distributions for a fault rupture length of 25 km (15.5
miles). The longer rupture length corresponds to a larger
magnitude. The figure shows the distributions for both the
probability of the closest distance to the fault rupture, R,
being less than a certain value, P(R<rj|mi) and the
probability of earthquakes occurring at a certain distance
E-3
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