1. MAPPING GEOPHYSICAL HAZARDS AND RISKS IN THE PHILIPPINES
Dissemination Workshop for Mapping Philippine Vulnerability to Environmental Disasters
Klima Climate Change Center
8 July 2005
Solid Earth Dynamics Program -Center for Environmental Geomatics
Manila Observatory

2. Outline I. Introduction II. Geophysical Hazards and Risk Mapping
III. Conclusion

3. Seismicity of the Philippines from 1907-2000 Source: Phivolcs Database

5. likelihood of harm, loss, disaster
RISK

6. RISK HAZARD EXPOSURE VULNERABILITY Physical impact of disturbance
Elements affected by hazard
EXPOSURE
Capacity of a community to prepare, absorb and recover from hazard
VULNERABILITY
RISK

7. Risk = H x E x V

8. EXPOSURE POPULATION DENSITY 2000 National Statistics Office
City/Municipal Population Data
1km x 1km grids

9. HUMAN DEVELOPMENT INDEX (2000)
VULNERABILITY
HUMAN DEVELOPMENT INDEX (2000)
UNDP
Education
Health
Income

10. EXPOSURE/VULNERABILITY
HUMAN DEVELOPMENT INDEX (2000)
POPULATION DENSITY 2000

11. Hazards/Risks 19 July 1990 (PDI, INS)
27 July 1990 (Gacad, Romeo, AFP, INS)
8 July 1991
(Cabrido, Boy, PDI, INS)

12. National Geophysical Data Center
HAZARD
EARTHQUAKE
National Geophysical Data Center
0.25º x 0.25º grids
( )

13. RISK (Earthquake) Surigao Del Sur La Union Benguet Pangasinan Pampanga
Tarlac
Ifugao
Davao Oriental
Nueva Vizcaya
Nueva Ecija
Agusan Del Sur
Surigao Del Norte
Sarangani
Zambales
Maguindanao
Bataan
Batangas
Agusan Del Norte
Davao del Norte
Ilocos Sur

14. HAZARD
EARTHQUAKE-INDUCED
SHALLOW LANDSLIDES
PHIVOLCS

15. RISK (EQ-Induced Landslides)
Ifugao
Lanao Del Sur
Sarangani
Benguet
Mountain Province
Bukidnon
Aurora
Davao Del Sur
Davao Oriental
Rizal
Misamis Oriental
Abra
Nueva Vizcaya
Quirino
Davao del Norte
Kalinga
Apayao
South Cotabato
Zambales
Southern Leyte

16. DISTRIBUTION OF VOLCANOES
HAZARD
DISTRIBUTION OF VOLCANOES
PHIVOLCS

17. RISK (Volcano) Camiguin Sulu Biliran Albay Bataan Sorsogon
South Cotabato
Laguna
Camarines Sur
Batanes
Negros Occidental
Marinduque
North Cotabato
Batangas
Zambales
Pampanga
Bukidnon
Lanao Del Sur
Negros Oriental
Quezon

18. Environmental and Natural Resources Atlas of the Philippines, ECPF
HAZARD
TSUNAMI
Environmental and Natural Resources Atlas of the Philippines, ECPF

19. RISK (Tsunami) Sulu Tawi-tawi Basilan Batanes Guimaras Romblon
Siquijor
Surigao Del Norte
Camiguin
Masbate
Zamboanga Del Sur
Bataan
Batangas
Quezon
Bohol
Sorsogon
Northern Samar
Albay
Marinduque
Surigao Del Sur

21. Conclusion Areas at risk to earthquakes
- West of Northern Luzon and Eastern Mindanao
Areas at risk to earthquake-induced landslides
- Northern Luzon and Mindanao
Areas at risk to tsunamis
- Northwest to southeast diagonal across RP
Areas at risk to volcanoes