1. M7.4 EARTHQUAKE STRIKES NEAR ACAPULCO, MEXICO March 19, 2012
More lectures at Disasters Supercourse -
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. PAST NOTABLE DISASTERS
MEXICO CITY
1985 EARTHQUAKE
10,000 CASUALTIES
$ 4,000 M LOSS (1985 VALUES)
$ 275 M INSURED LOSS

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

11. EXAMPLE OF SOIL AMPLIFICATION

13. SCHOOL: MEXICO; SEPT. 19, 1985