HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text (PDF) References Citation Map Services Email this article to a friend Similar articles in this journal Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Google Scholar Articles by COX, A. Articles by STAUDER, W. Search for Related Content GeoRef GeoRef Citation

Geometrical properties of groups of fault plane solutions

INSTITUTE OF TECHNOLOGY ST. LOUIS UNIVERSITY, ST. LOUIS, MISSOURI
U. S. GEOLOGICAL SURVEY, MENLO PARK, CALIFORNIA

Abstract

A formal method of analysis is proposed whereby groups of first motion solutions may be examined for evidence of regional patterns of symmetry, abstracting from any particular model of the focus or from assumptions about regional tectonics. Axial, planar, and conical symmetry are discussed with special consideration being given to the constraints placed on the spacial distribution of axes by the geometry of sets of orthogonal axes. Examples from the literature are given of axial and planar symmetry, and it is shown that in some instances attention to the geometry of the axis system suggests modifications in the interpretation of regional patterns. Analytical aids are also given to associate the use of eigenvalues with the graphical methods in discerning the type of symmetry and indicating the degree of scatter, and a method is described for calculating statistical confidence limits for the case of axial symmetry.

This article has been cited by other articles:

				W. STAUDER A comparison of multiple solutions of focal mechanisms Bulletin of the Seismological Society of America, June 1, 1964; 54(3): 927 - 937. [Abstract] [PDF]