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City of Santa Ana Job No: 01-3058-002-01-00 <br />September 25, 1992 Log No: 2-2662 <br />Page 7 <br />5.2 Earthquake Effects <br />5.2.1 Surface Fault Rupture <br />As previously mentioned, no active faults are <br />known to cross or lie within the limits of the <br />property.Therefore, the hazard of surface <br />fault rupture at the site is considered to be <br />nil. <br />5.2.2 Earthquake Accelerations <br />a.We have analyzed the possible earthquake <br />accelerations at the site and determined <br />that,for the intended use, the most <br />significant event would be a 6.9 <br />magnitude earthquake occurring in the <br />Newport-Inglewood Fault Zone (Everndon, <br />3.Â¥.and Thomson,J.M.,1985;and <br />Wesnousky,S.G.,1986).The <br />accelerations produced at the site by a <br />maximum credible magnitude 6.9 earthquake <br />on this fault would equal or exceed in <br />intensity and duration those of events on <br />any other known fault. <br />b.A magnitude 6.9 earthquake on the <br />Newport-Inglewood Fault Zone could <br />produce a peak ground acceleration on the <br />order of 0.35g at the site (See H.B., and <br />Idriss, I.M., 1982) with the duration of <br />strong motion exceeding 30 seconds (Bolt,