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MAGNITUDE 6.3 EARTHQUAKE STRIKES TAIWAN (7:02 pm, October 31, 2013)

MAGNITUDE 6.3 EARTHQUAKE STRIKES TAIWAN (7:02 pm, October 31, 2013). Walter Hays, Global Alliance for Disaster Reduction, Vienna, Virginia, USA . LOCATION MAP. 7:02 PM, OCTOBER 31, 2013.

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MAGNITUDE 6.3 EARTHQUAKE STRIKES TAIWAN (7:02 pm, October 31, 2013)

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  1. MAGNITUDE 6.3 EARTHQUAKE STRIKES TAIWAN(7:02 pm, October 31, 2013) Walter Hays, Global Alliance for Disaster Reduction, Vienna, Virginia, USA 

  2. LOCATION MAP

  3. 7:02 PM, OCTOBER 31, 2013 • At 7:02 pm, a magnitude 6.3 earthquake occurred 45 km (28 miles) south-southwest of the coastal city of Hualian. • The shallow depth of 12 km (7.5 mi) exacerbated the ground shaking. • Buildings over a wide area, including Taipei, the capital city, were shaken.

  4. EACH EARTHQUAKE IS AN OPPORTUNITY TO ADD TO THE“GLOBAL BOOK OF KNOWLEDGE” ON OCCURRENCES, CONSEQUENCES, AND DISASTER RISK REDUCTION MEASURES

  5. A NOTE ON THE PASTA magnitude 7.6 earthquake in central Taiwan in 1999 killed 2,416 people

  6. THE JI JI, TAIWAN EARTHQUAKE M 7.6 Shallow depth (about 2 km) 1:47 am SEPTEMBER 21, 1999

  7. JI JI, TAIWAN EARTHQUAKE BASED ON REPORTS BY USGS, EERI, ASCE/TCLEE, MCEER, TAIWAN AGENCIES, AND OTHERS

  8. JI JI, TAIWAN EARTHQUAKE

  9. JI JI, TAIWAN EARTHQUAKE

  10. THE MAIN SHOCK WAS FOLLOWED BY 9,000+ AFTERSHOCKS OVER 2 YEARS

  11. JI JI, TAIWAN EARTHQUAKE The 1999 Taiwan earthquake was a subduction zone earthquake caused by interaction of the Philippine plate with the Eurasian plate.

  12. The quake was generated by slip on the Chelongpu fault. EARTHQUAKE FAULT

  13. PHYSICAL EFFECTS: GROUND SHAKING • Strong motion records showed that ground shaking was characterized by long-period energy related to the magnitude and local site conditions. • It was several times greater than the level prescribed in the building code.

  14. SEISMIC DESIGN MAP IN BUILDING CODE

  15. 44,338 buildings collapsed, and an additional 41,336 houses and buildings were severely damaged. Twenty 10- to 20-story residential buildings either collapsed or experienced significant damage, suggesting frequency-dependent site amplification. SOCIOECONOMIC IMPACTS

  16. SOCIOECONOMIC IMPACTS Strong ground shaking from the main shock and its large aftershocks caused the collapse of a few mid-rise buildings in Taipei, the capital, which is located about 140 km north of the epicenter in a deep alluvial basin.

  17. SOCIOECONOMIC IMPACTS Strong ground shaking, ground failure, and surface fault rupture caused power outages and severe lifeline damage. Some examples of lifeline damage had not been observed in other earthquakes..

  18. SOCIOECONOMIC IMPACTS The loss of power had wide ranging effects, including disruption of Taiwan’s semi-conductor fabrication facilities.

  19. PHYSICAL EFFECTS: SURFACE FAULTING The regional compression caused thrust faulting. Over 60 km of surface faulting with lateral and vertical displacements reaching 9 m and 5 m, respectively, occurred in the center of the Island.

  20. SOCIOECONOMIC IMPACTS Most of the bridges that suffered significant damage were located in the area bounded by two thrust faults that ruptured the surface.

  21. PHYSICAL EFFECTS: LIQUEFACTION Liquefaction caused damage in a residential neighborhood of Yuanlin located in Changhua County. Extensive liquefaction-induced damage was also observed in parts of Taichung Harbor.

  22. The death toll reached 2,416. 11,446 were injured. Economic losses reached $9.2 billion. Short-term global stock market prices were influenced by impacts on the semi-conductor industry. SOCIOECONOMIC IMPACTS

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