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<r*j|mi) and the

probability of earthquakes occurring at a certain distance

E-3

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