Supplementary information
From the following article:
A sharp lithosphere–asthenosphere boundary imaged beneath eastern North America
Catherine A. Rychert, Karen M. Fischer & Stéphane Rondenay
Nature 436, 542-545(28 July 2005)
doi:10.1038/nature03904
Supplementary Figure S1
SV waveforms from station HRV are deconvolved and migrated in epicentral distance bins, illustrating one method we use to identify direct converted phases.
Supplementary Figure S2
This demonstrates the trade-off in model parameters in our inversions. a) A range of models fits the phase from the base of the lithosphere at stations HRV and LMN. b) The range of acceptable models is limited by an independent constraint on the dominant period of the incident P-wave, which is determined by an auto-deconvolution test.
Supplementary Figure Legends
Full text to accompany the Supplementary Figures
Supplementary Methods
This describes the data included in our results, methods for identifying seismic discontinuities, ambiguous existence of the 61 km discontinuity, assumptions in our modelling, steps and methods of the inversions, auxiliary testing that ensures our assumptions do not affect the final results, error and parameter trade-offs, and the effects of temperature, hydration, grain size, and melt on seismic velocity.
Supplementary Table S1
This table summarises the parameters that were held fixed and those for which we inverted in each step of the inversions for HRV and LMN.
Supplementary Table S2
This table summarises the results of our inversions for velocities and thicknesses in the crust, lithosphere, and lithosphere-asthenosphere boundary at stations LMN and HRV.
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