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M7.4 EARTHQUAKE STRIKES NEAR ACAPULCO, MEXICO March 19, 2012

M7.4 EARTHQUAKE STRIKES NEAR ACAPULCO, MEXICO March 19, 2012. Walter Hays, Global Alliance for Disaster Reduction, University of North Carolina, USA. REGIONAL LOCATION MAP. LOCATION.

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M7.4 EARTHQUAKE STRIKES NEAR ACAPULCO, MEXICO March 19, 2012

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  1. M7.4 EARTHQUAKE STRIKES NEAR ACAPULCO, MEXICOMarch 19, 2012 Walter Hays, Global Alliance for Disaster Reduction, University of North Carolina, USA

  2. REGIONAL LOCATION MAP

  3. LOCATION

  4. The 20 km (12.4 miles) deep, M7.4 earthquake occurred as the result of thrust faulting on or near the interface between the Cocos and North American tectonic plates

  5. COCOS PLATE SUBDUCTION ZONE

  6. INITIAL REPORTS • The ground shook for about 1 minute (very short compared with 10 minutes for the December 26, 2004 M9.0 Indonesia quake) • 500 homes in the state of Guerrero collapsed • Bridge collapsed in Mexico City • No deaths

  7. BRIDGE COLLAPSED IN MEXICO CITY, OVER 330 KM FROM SOURCE

  8. REMEMBERING PAST EARTHQUAKE DISASTERS IN MEXICO September 19, 1985

  9. MEXICO CITY 1985 EARTHQUAKE 10,000 CASUALTIES $ 4,000 MLOSS(1985 VALUES) $ 275 MINSURED LOSS PAST NOTABLE DISASTERS

  10. MEXICO CITY IS WELL KNOWN FOR 2-SEC PERIOD SOIL AMPLIFICATION AT SITES IN THE OLD LAKE BED

  11. EXAMPLE OF SOIL AMPLIFICATION

  12. SCHOOL: MEXICO; SEPT. 19, 1985

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