Shear‐wave splitting and anisotropy in the Charlevoix Seismic Zone, Quebec | Zendy

Buchbinder Goetz G. R. | Zendy

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Shear‐wave splitting and anisotropy in the Charlevoix Seismic Zone, Quebec

Author(s) -

Buchbinder Goetz G. R.

Publication year - 1985

Publication title -

geophysical research letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.007

H-Index - 273

eISSN - 1944-8007

pISSN - 0094-8276

DOI - 10.1029/gl012i007p00425

Subject(s) - shear wave splitting , geology , seismology , seismogram , seismometer , shear (geology) , azimuth , anisotropy , shear waves , seismic anisotropy , seismic wave , geophysics , petrology , physics , mantle (geology) , optics

During the month of August 1984 an experiment was undertaken in the Charlevoix Seismic Zone to test the hypothesis that shear‐wave splitting could be observed in a seismically active region. Seismograms, recorded by digital 3‐component seismographs, located very close to the epicentres of three earthquakes, showed shear‐wave splitting. The amount of splitting was estimated to be 1.6% to 2% of the shear wave velocity from particle motion diagrams. The average azimuth of the direction of polarization was 30°. These observations can be explained by the presence of vertical cracks striking 30° east of north, with a minimum crack density of ε = 0.03.

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