Post on 10-Jul-2020
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EARTHQUAKES AND DISASTER PREPAREDNESS
24TH SHDA-HUDCC National Developers ConventionDevelopers Convention
17September 2015
Renato U. Solidum, Jr.Philippine Institute of Volcanology and Seismology
Department of Science and Technology
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The Philippines is prone to many natural hazards due to its geologic and geographic setting
HAZARDSCAPE OF THE PHILIPPINES
Earthquake Tsunami Volcanic eruption
Typhoon Storm surge Flood Landslide
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an average of 20 earthquakes recorded per day
4-5 felt earthquakes per week
PHILIPPINE SEISMICITY
per week
5000 plotted earthquakes per year
90 destructive earthquakes for past 400 years
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How do we prepare for and reduce risks from earthquakes?
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DISASTER IMAGINATION
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• Know Hazards and Risks
<- Hazard and Risk Assessment
• Monitor
KEY ACTIONS FOR DISASTER RISK REDUCTION
<- Monitoring
• Warn and Disseminate Information
<- Communication
• Respond Properly and Timely
<- Mitigation, Preparedness
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How do we prepare for earthquakes?
Know the hazards and potential impacts in your area and impacts in your area and
surrounding ? Determine safe and not safe areas. Avoid unsafe areas
or mitigate potential effects of hazards.
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EARTHQUAKE-RELATED HAZARDS
Ground Shaking LiquefactionFaulting (Ground)
Rupture
Fault
TsunamiFire
Landslide
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EFFECTS OF GROUND RUPTURE
• Rupture damage and collapse of houses, structures on structures on top of fault
• Ruptured roads, bridges
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Earthquake Generators in the Philippines:Active Faultsand Trenches
Active Faults
Trenches
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The Valley Fault System (VFS) in Greater Metro
Manila Areas Atlas
• 33 map sheets• Metro Manila
• 1:5,000 (22 map sheets)• 1:5,000 (22 map sheets)• Laguna and Cavite
• 1:10,000 (10 map sheets)• Bulacan and Rizal
• 1:50,000 (1 map sheet)
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Glorietta from the WVF Using the PHIVOLCS Fault Finder App
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BUFFER ZONE2008 M 7.9 Sichuan, China
Earthquake
Bailu school, looking northeast in direction of rupturePhoto credit to Dr. Gary Gibson
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GROUND SHAKING EFFECTS
Building Collapse Falling Objects
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GROUND SHAKING IN GREATER METRO MANILA (M 7.2 West Valley Fault Earthquake)
(Risk Analysis Project, 2013: PHIVOLCS, GA supported by AusAID)
BULACAN
PAMPANGA
NCRRIZAL
CAVITE
LAGUNA