Authors / CoAuthors
Peñarubia, H.C. | Johnson, K.L. | Styron, R.H. | Bacolcol, T.C. | Sevilla, W.I.G. | Perez, J.S. | Bonita, J.D. | Narag, I.C. | Solidum, R.U | Pagani, M.M. | Allen, T.
Abstract
The Philippine archipalego is tectonically complex and seismically hazardous, yet few seismic hazard assessments have provided national coverage. This paper presents an updated probabilistic seismic hazard analysis for the nation. Active shallow crustal seismicity is modeled by faults and gridded point sources accounting for spatially variable occurrence rates. Subduction interfaces are modelled with faults of complex geometry. Intraslab seismicity is modeled by ruptures filling the slab volume. Source geometries and earthquake rates are derived from seismicity catalogs, geophysical datasets, and historic-to-paleoseismic constraints on fault slip rates. The ground motion characterization includes models designed for global use, with partial constraint by residual analysis. Shallow crustal faulting near metropolitan Manila, Davao, and Cebu dominates shaking hazard. In a few places, peak ground acceleration with 10% probability of exceedance in 50 years on rock reaches 1.0 g. The results of this study may assist in calculating the design base shear in the National Structural Code of the Philippines.
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document
eCat Id
129579
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Keywords
- theme.ANZRC Fields of Research.rdf
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- Earthquake Engineering
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- seismic hazard
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- Pacific Nations
- ( {1} )
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- Hazard Response
- ( {1} )
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- Natural Hazards
- ( {1} )
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- earthquakes
- ( {1} )
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- Philippines
- ( {1} )
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- Published_External
Publication Date
2020-05-12T00:46:34
Creation Date
2019-06-04T12:00:00
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completed
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Global Earthquake Model - Earthquake Spectra Special Issue
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geoscientificInformation
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[4.0396, 20.7972, 114.8607, 128.308]
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