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City of Santa Ana Emergency Operations Plan <br />Part I Basic Plan <br />Puente Hills Thrust Fault: This is another recently discovered blind thrust fault that runs from northern Orange <br />County to downtown Los Angeles. This fault is now known to be the source of the 1987 Whittier Narrows <br />Earthquake. Recent studies indicate that this fault has experienced four major earthquakes ranging in magnitude <br />from 7.2 to 7.5 in the past 11,000 years, but that the recurrence interval for these large events is approximately <br />several thousand years. <br />Figure 50 M 7.1 Earthquake on the Puente Hills Fault <br />45 <br />34' <br />33. 5' <br />-- Earthquake Planning Scenario -- <br />hal elMap for Puente Hills M7.1 Scenario <br />Scenario Date; Qcl 10. 201212:00,00 PM UTC M 7,1 N34,051V 117.92 l plh. 11,4km <br />-11 9' -11 8' -117' <br />PLANNING SGENARn ONLY — Map Vinrrsion 1 NWMS d 2015- M-31 11 f32 PM UTC <br />KING <br />Nol fell <br />VW"k <br />UPI <br />Moderate <br />Strong <br />Very Wrong Severe VkAent EVFeme <br />RSTEWEL <br />nova <br />or nm <br />riona <br />VaryIlghl <br />L4ghl <br />Madorato ModJHNVV M&Vy V HaaVy <br />PEAK AClr4%g) <br />.I <br />a <br />2.4 <br />6.7 <br />13 <br />24 44 63 156 <br />PEAK VElicniva) <br />�0.07 <br />0A <br />1.9 <br />!1Z <br />11 <br />22 43 W ,160 <br />INSTRUMENTAL <br />I <br />11-M1 <br />lV <br />V <br />11 <br />V11 <br />INTENSITY <br />Saalcbi &d upon Wald. el 3I.: 19199 <br />50 <br />