Journal
JOURNAL OF SEISMOLOGY
Volume 14, Issue 3, Pages 601-614Publisher
SPRINGER
DOI: 10.1007/s10950-009-9185-8
Keywords
Surface wave; Double couple; Moment tensor; Focal mechanism
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Funding
- Presidium of Russian Academy of Sciences
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We treat the problem of the non-uniqueness of the moment tensor inversion for shallow earthquakes from long period surface wave data. We give an existence condition for double couples radiating the same long period surface waves as the deviatoric moment tensor obtained by such inversion. We describe the family of such double couples and show that they may provide better estimates of double couple mechanisms than the traditional best double-couple solution. We demonstrate the results of application to four large shallow earthquakes with different source signatures.
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