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City of Santa Ana Emergency Operations Plan <br />Part I Basic Plan <br />Newport -Inglewood Fault Zone: This fault extends from the Santa Monica Mountains southeastward to Orange <br />County, paralleling the coast to Newport Beach and then continues paralleling the coast offshore to southern <br />Orange County. This was the source of the destructive 1933 Long Beach Earthquake (magnitude 6.4), whose <br />epicenter was in Huntington Beach and which caused 120 deaths and considerable property damage. Orange <br />County was sparsely populated at the time but three of the four deaths occurring in Orange County occurred in <br />downtown Santa Ana. The original Santa Ana City Hall, previously located at Third and Main Streets on the site <br />of the current Old City Hall, was destroyed by this earthquake, as was the original Santa Ana High School. During <br />the past 60 years, numerous other shocks ranging from magnitude 3.0 to 5.0 have been recorded. The Southern <br />California Earthquake Center (SCEC) reports probable earthquake magnitudes for the Newport -Inglewood fault <br />to be in the range of 6.0 to 7.4 with an unknown recurrence interval. <br />Figure 45 M 6.9 Earthquake on the Newport -Inglewood Fault <br />— Earthquake Planning Scenario — <br />ShakeMap for Newport -Inglewood <br />Scenario Date: Fri Aug 3, 2001 05:00:00 AM PDT M 6.9 <br />34.5° <br />34' <br />33.5° <br />-1190 -1186 <br />M6.9 Scenario <br />N33.78 W118.13 Depth: 6.0krn <br />PLANNING SCENARIO ONLY - IAap Version 4 Processed Tue Nov 30, 2010 02:00:43 PM PST <br />PBNCOING <br />Not fed <br />Weak <br />LgN <br />101oderate <br />Strong <br />Verystrong Severe Violent Extrene <br />POTENTIALrune <br />OA <br />rane <br />nme <br />Very Ight <br />light <br />Moderate IAoderflle7Hesvy Heavy Very Heavy <br />PEAKA0C4%9) <br />c17 <br />.17-Y.4 <br />1.4-X9 <br />3.9-9.2 <br />92-18 <br />1834 34-85 65.124 >124 <br />PEAKVEL4cm'a7 <br />A.1 <br />0.1-1.1 <br />1.13.4 <br />3.4-8.1 <br />8.1-1151 <br />16-31 31-60 60-11B a11B <br />INS'RENSINTAL <br />1 <br />14111 <br />N <br />-- V <br />VI <br />i <br />45 <br />