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City of Santa Ana Emergency Operations Plan <br />Part I Basic Plan <br />San Jacinto Fault Zone: This 130-mile-long fault is located approximately 30 miles north and east of the county <br />and parallels the near side of the San Andreas Fault. The San Jacinto Fault was active with several earthquakes <br />in the first half of the 20t' century. The most recent event (1968 M6.5) occurred on the southern half of the Coyote <br />Creek segment. The estimated recurrence interval between ruptures is between 100 and 300 years, per segment <br />with probable magnitudes in the range of 6.5 to 7.5. <br />San Joaquin Hills Fault: Recently discovered in the 1990's, this fault originates near the Newport -Inglewood <br />Fault close to Huntington Beach and runs south, paralleling the 405 and 73 Freeways at the western margins of <br />the San Joaquin Hills. Rupture of the entire area of this blind thrust fault could generate an earthquake as large <br />as M 7.3. Fortunately, the average recurrence interval for moderate -sized earthquakes on this fault has been <br />estimated between about 1,650 and 3,100 years with the last major rupture occurring in 1769. <br />Figure 49 M 6.6 Earthquake on the San Joaquin Hills Fault <br />-- Earthquake Planning Scenario -- <br />hakeh+lap for San Joaquin Hills Scenario <br />Scenario Date: Sat Jan 11, 2003 04:00:00 AM PST M 6.6 N33.50 Vw117.75 depth: 7.5km <br />341 <br />33.5" <br />3 3' <br />-118' -117' <br />PLANNING SCENARIO ONLY — Map Version 2 Praoessed Tue Nov 30, 2010 02:10:09 PIA PST <br />PSHHAIJiING <br />Nottett <br />Weak <br />Light <br />Moderate <br />Strang <br />Verystrong <br />Severe Violent Extreme <br />POTENTAL <br />OARkGE <br />none <br />none <br />none <br />Very ighl <br />Ughl <br />Moderale <br />ModeraieMeavy Heavy Very Heavy <br />PEAKACO-49FUj <br />{,]7 <br />A74.4 <br />1.4-19 <br />3.9-9.2 <br />92-Y& <br />18-34 <br />34-65 65-124 >124 <br />PEAKVELlrom's] <br />40.1 <br />0.1-1.1 <br />1.1-3.4 <br />3.4-8.1 <br />S.1-16 <br />1B-31 <br />31-B0 B9416 :-i16 <br />INSTRUMENNSITTAL <br />11-��� <br />1 <br />il <br />INTEY <br />49 <br />