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A fractal approach to probabilistic seismic hazard assessmentThe definition of a fractal distribution is that the number of objects (events) N with a characteristic size greater than r satisfies the relation N proportional to r exp - D is the fractal dimension. The applicability of a fractal relation implies that the underlying physical process is scale-invariant over the range of applicability of the relation. The empirical frequency-magnitude relation for earthquakes defining a b-value is a fractal relation with D = 2b. Accepting the fractal distribution, the level of regional seismicity can be related to the rate of regional strain and the magnitude of the largest characteristic earthquake. High levels of seismic activity indicate either a large regional strain or a low-magnitude maximum characteristic earthquake (or both). If the regional seismicity has a weak time dependence, the approach can be used to make probabilistic seismic hazard assessments.
Document ID
19900034851
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Turcotte, D. L.
(Cornell University Ithaca, NY, United States)
Date Acquired
August 14, 2013
Publication Date
January 1, 1989
Publication Information
Publication: Tectonophysics
Volume: 167
ISSN: 0040-1951
Subject Category
Geophysics
Accession Number
90A21906
Funding Number(s)
CONTRACT_GRANT: NGR-33-010-108
Distribution Limits
Public
Copyright
Other

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