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NYC Earthquake Preparedness: Impact, Risks, and Key Resources Overview

Learn about earthquakes in NYC, potential impact, seismic history, soil composition, building damage, critical infrastructure, and preparedness measures for healthcare and transportation. Stay informed and plan for potential seismic events.

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NYC Earthquake Preparedness: Impact, Risks, and Key Resources Overview

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  1. Earthquake NYC Department of Health and Mental Hygiene Office of Emergency Preparedness and Response

  2. Overview, Impact and Healthcare/Critical Infrastructure Key Resources (CIKR) 2

  3. Background Information • An earthquake is a sudden, rapid shaking of the earth caused by the breaking and shifting of plates beneath the earth’s surface. • As the rocks move past each other, they occasionally stick along the faults, causing a gradual buildup of energy or strain. • This energy is abruptly released in the form of seismic waves, which travel away from the earthquake’s source. 3

  4. Magnitude, Intensity And Severity 4

  5. Richter and Mercalli 5

  6. Peak Ground Acceleration • Most damage and loss caused by an earthquake is directly or indirectly the result of ground shaking. • We can identify the areas, structures, and systems with highest risk and ultimately help reduce those risks. 6 Mapping of geographic distribution of ground shaking (PGA) in New York. Source: http://www.nycem.org/techdocs/FinalReport/03-SP02p.pdf

  7. Seismic History - Northeast Ramapo Fault 7 Earthquakes in the USA Northeast and Canada border area. Source: http://www.nycem.org/techdocs/FinalReport/03-SP02p.pdf

  8. NYC Faults • Mosholu Parkway fault • Dyckman Street fault • Manhattan's 125th Street fault • What does this mean to us? 8 • NYC Faults and Disaster Relevant Facilities. Source: http://nymag.com/news/articles/08/06/GeographyofDisaster/map.html

  9. NYC Soil Geologic Composition 9 Types of soils in New York. Source: http://www.nycem.org/techdocs/FinalReport/03-SP02p.pdf

  10. Manhattan Soil Composition 10 NEHRP Soil classifications in Manhattan. Source: http://www.nycem.org/techdocs/FinalReport/03-SP02p.pdf

  11. Impact 11

  12. Impact – Building Composition 12 Types of buildings in Manhattan. Source: http://www.nycem.org/techdocs/FinalReport/03-SP02p.pdf

  13. Impact – Building Damage 13 Expected Structural Damage in Manhattan. Source: http://www.nycem.org/techdocs/FinalReport/03-SP02p.pdf

  14. Impact – Injuries and Casualties • Why do people get injured? • How are injuries and casualties estimated? • How many injuries and casualties are likely to be recorded? 14 Injuries (Left) and Casualties (Right) Estimates for Different Earthquake Scenarios. Source: http://www.nycem.org/techdocs/FinalReport/03-SP02p.pdf

  15. Critical Infrastructure and Key Resources(CIKRs) • Assets, systems, networks, and functions—physical or virtual—so vital to the United States that their incapacitation or destruction would have a debilitating impact to the country. • Defined by the Department of Homeland Security 15

  16. CIKR – Healthcare & Public HealthToxic Release 16 Hazardous Materials Sites. Source: http://www.nycem.org/techdocs/FinalReport/03-SP02p.pdf

  17. CIKR – Transportation 17 • Debris quantity in Manhattan in three different earthquake scenarios. Source: http://www.nycem.org/techdocs/FinalReport/03-SP02p.pdf

  18. CIKR – Water • Combined sewer system • Threats: • Heavy Rainfall • Snowmelt • Hurricane • Earthquake • Aging Infrastructure • Vulnerability • Impact Combined Sewer Overflow (CSO) 18 • Combined Sewer Overflow. Source: http://blog.seattlepi.com/capitolhill/2011/04/07/capitol-hill%E2%80%99s-sewer-overflow/

  19. CIKR – Water (cont’d) 19 Figure : NYC Sewer Outflows and Wastewater Treatment Facilities. Source: http://sebagocanoeclub.blogspot.com/2011/07/collective-map-of-sewage-outflowsfyi.html

  20. Challenges & Lessons Observed • Insurance Coverage • Planning for earthquakes is essential in seismically active regions • Develop and maintain an earthquake plan that will be constantly updated • Development of urban search and rescue resources is essential • The need for a fail-safe emergency communication system to manage both information and resources • Lack of standardized emergency management planning policies and operational procedures can worsen the outcome of an event • This is why OEPR with the assistance of subject matter experts have prepared a threat response guide to define DOHMH’s role and responsibilities for an earthquake 20

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