Embed Size (px)
Citation preview
JIIRP WorkshopFebruary 26, 2007
Earthquake Hazard Earthquake Hazard and Preparedness and Preparedness In British ColumbiaIn British Columbia
Maiclaire Bolton
Emergency Management Analyst – Seismic Hazards
YES!
Is there an Earthquake Is there an Earthquake Threat in BC?Threat in BC?
History of Damaging History of Damaging earthquakes in BCearthquakes 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)
Why do they occur? Why do they occur?
North America Plate EQs (1946)
Juan de Fuca Plate EQs
(2001)
Subduction ZoneEQs (1700) The Big One
Deep
Shallow
Earthquake EffectsEarthquake EffectsThe Primary effect is strong ground
motion – shaking and rolling...
Izmit, Turkey, 1999
Olympia, WA 2001
Northridge, CA1994
Secondary Earthquake EffectsSecondary Earthquake Effects
Liquefaction…
Nigata, Japan (1964)
Kocaeli, Turkey (1995)Kocaeli, Turkey (1995)
Landslides…
Secondary Earthquake EffectsSecondary Earthquake Effects
U.C.Davis; Virginia Tech.U.C.Davis; Virginia Tech.Kobe (1995)Kobe (1995)
Subsidence…
Secondary Earthquake EffectsSecondary Earthquake Effects
U.C.Davis; Virginia Tech.U.C.Davis; Virginia Tech.Kocaeli, Turkey (1995)Kocaeli, Turkey (1995)
Flooding...
Secondary Earthquake EffectsSecondary Earthquake Effects
Chi Chi, Taiwan (1999)
Loma Prieta, CA (1989)
Izmit, Turkey (1999)
Secondary Earthquake EffectsSecondary Earthquake EffectsFires...
Tsunamis...
Secondary Earthquake EffectsSecondary Earthquake Effects
Port Alberni, BC (1964)
Anchorage, AK (1964)
Earthquake PreparednessEarthquake Preparedness
Before an EarthquakeBefore 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
Earthquake PreparednessEarthquake Preparedness
During an EarthquakeDuring an Earthquake
• Drop, Cover, and Hold.
• Remain in a protected place until shaking stops
Earthquake PreparednessEarthquake Preparedness
After an EarthquakeAfter an Earthquake• Stay calm
• prevent further injury
• hang up phones
• get earthquake kit
• check for hazards,
• check for building damage
• expect aftershocks
Earthquake Damage…Earthquake Damage…
What can we expect?What can we expect?
Chimney FailureChimney Failure
CourtenayCourtenayElementary Elementary
SchoolSchool
Vancouver Island 1946 (M7.3) GSCGSC
Loma Prieta 1989 (M7.2)Loma Prieta 1989 (M7.2)
URM Wall CollapseURM Wall Collapse
FEMAFEMA
Nisqually 2001 (M6.8)Nisqually 2001 (M6.8) Seattle TimesSeattle Times
URM CollapseURM Collapse
Soft Storey FailureSoft Storey Failure
Loma Prieta 1989 (M7.2)Loma Prieta 1989 (M7.2) FEMAFEMA
Soft Storey FailureSoft Storey Failure
Loma Prieta 1989 (M7.2)Loma Prieta 1989 (M7.2) FEMAFEMA
Morocco 1960 (M6.7)Morocco 1960 (M6.7)
Building CollapseBuilding Collapse
FEMAFEMA
Pancaking (13 storey URC)Pancaking (13 storey URC)
Mexico City 1985 (M8.1)Mexico City 1985 (M8.1) FEMAFEMA
Loma Prieta 1989 (M7.2)Loma Prieta 1989 (M7.2)
Freeway CollapseFreeway Collapse
FEMAFEMA
Freeway CollapseFreeway Collapse
Kobe 1995 (M6.9)Kobe 1995 (M6.9) FEMAFEMA
Dam FailureDam Failure
Chi-chi (Taiwan) 1999 (M7.6)Chi-chi (Taiwan) 1999 (M7.6) U.C.Davis; Virginia Tech.
