Orientation-independent, nongeometric-mean measures of seismic intensity from two horizontal components of motion

Bulletin of the Seismological Society of America
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Abstract

New measures of spectral intensity based on the horizontal components of ground shaking are introduced. These new measures are independent of the in situ orientation of the recordings and encompass the full range of spectral amplitudes over all possible rotation angles. Unlike previously introduced measures that are also orientation independent, no geometric means are used in the computation of the new measures. The new measures based on fiftieth percentile values of the response spectra show small but systematic increases (to a factor of about 1.07 at a 10 sec period) compared to the comparable geometric-mean measure.

Additional publication details

Publication type Article
Publication Subtype Journal Article
Title Orientation-independent, nongeometric-mean measures of seismic intensity from two horizontal components of motion
Series title Bulletin of the Seismological Society of America
DOI 10.1785/0120090400
Volume 100
Issue 4
Year Published 2010
Language English
Publisher Seismological Society of America
Publisher location El Cerrito, CA
Contributing office(s) Earthquake Science Center
Description 6 p.
Larger Work Type Article
Larger Work Subtype Journal Article
Larger Work Title Bulletin of the Seismological Society of America
First page 1830
Last page 1835