Abstract
Summary Areas of compressional and dilational first ground motion common to a suite of P-wave first motion double-couple fault plane solutions have been used to constrain the orientations of the principal stress axes. The example data set consists of four reasonably well-constrained, but non-unique, microseismic focal mechanisms observed during high-pressure fluid injections into granite. The constraints imposed on the orientations of the principal stress axes are compared for cases in which a single and 10 possible solutions have been obtained for each event. It is demonstrated that in order to constrain the stress axes correctly it is essential that the non-uniqueness of the focal mechanisms is taken into account. Attention is drawn to the fact that even with reasonably well-constrained fault plane solutions the principal stress orientations are highly sensitive to the non-uniqueness of the inferred focal mechanisms.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
