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Earthquake Hazard and Preparedness In British Columbia

Maiclaire Bolton Emergency Management Analyst – Seismic Hazards Maiclaire.Bolton@gov.bc.ca. Earthquake Hazard and Preparedness In British Columbia. JIIRP Workshop February 26, 2007. Is there an Earthquake Threat in BC?. YES!. History of Damaging earthquakes in BC.

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Earthquake Hazard and Preparedness In British Columbia

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  1. Maiclaire Bolton Emergency Management Analyst – Seismic Hazards Maiclaire.Bolton@gov.bc.ca Earthquake Hazard and Preparedness In British Columbia JIIRP Workshop February 26, 2007

  2. Is there an Earthquake Threat in BC? YES!

  3. History of Damaging earthquakes in BC The biggest earthquakes in BC were: 1700: W of Van. Island (M9) 1872: S. of Hope (M7.4) 1918: W. Van. Island(M7.0) 1946: W of Courtenay (M7.3) 1949: Queen Charlottes (M8.1)

  4. North America Plate EQs (1946) Shallow Juan de Fuca Plate EQs (2001) Subduction Zone EQs (1700) The Big One Deep Why do they occur?

  5. Earthquake Effects • The Primary effect is strong ground motion – shaking and rolling... Olympia, WA 2001 Izmit, Turkey, 1999 Northridge, CA 1994

  6. Secondary Earthquake Effects Liquefaction… Kocaeli, Turkey (1995) Nigata, Japan (1964)

  7. Secondary Earthquake Effects Landslides… Kobe (1995) U.C.Davis; Virginia Tech.

  8. Secondary Earthquake Effects Subsidence… Kocaeli, Turkey (1995) U.C.Davis; Virginia Tech.

  9. Secondary Earthquake Effects Flooding... Chi Chi, Taiwan (1999) Loma Prieta, CA (1989)

  10. Secondary Earthquake Effects Fires... Izmit, Turkey (1999)

  11. Secondary Earthquake Effects Tsunamis... Anchorage, AK (1964) Port Alberni, BC (1964)

  12. Earthquake Preparedness Before an Earthquake • Develop a plan • Prepare an emergency kit (home, work, vehicle) • Mitigate damage to your home • Plan to be self-sufficient for at least 72 hours

  13. Earthquake Preparedness During an Earthquake • Drop, Cover, and Hold. • Remain in a protected place until shaking stops

  14. Earthquake Preparedness After an Earthquake • Stay calm • prevent further injury • hang up phones • get earthquake kit • check for hazards, • check for building damage • expect aftershocks

  15. Earthquake Damage… What can we expect?

  16. Chimney Failure Courtenay Elementary School Vancouver Island 1946 (M7.3) GSC

  17. URM Wall Collapse Loma Prieta 1989 (M7.2) FEMA

  18. URM Collapse Nisqually 2001 (M6.8) Seattle Times

  19. Soft Storey Failure Loma Prieta 1989 (M7.2) FEMA

  20. Soft Storey Failure Loma Prieta 1989 (M7.2) FEMA

  21. Building Collapse Morocco 1960 (M6.7) FEMA

  22. Pancaking (13 storey URC) Mexico City 1985 (M8.1) FEMA

  23. Freeway Collapse Loma Prieta 1989 (M7.2) FEMA

  24. Freeway Collapse Kobe 1995 (M6.9) FEMA

  25. Dam Failure Chi-chi (Taiwan) 1999 (M7.6) U.C.Davis; Virginia Tech.

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