Variation of Lithosphere-Asthenosphere boundary beneath Iran by using S Receiver function

the lithosphere-asthenosphere boundary in the north-west of iran from s receiver function

recently, the s receiver function method has been successfully developed to identify upper mantle interfaces. s receiver functions have the advantage of being free of s-wave multiple reflections and can be more suitable than p receiver function for studying mantle lithosphere. however, because of specific ray geometry of the s-to-p converted waves, the s receiver function method has some techni...

P-to-S and S-to-P imaging of a sharp lithosphere-asthenosphere boundary beneath eastern North America

[1] S-to-P (Sp) scattered energy independently confirms the existence of a seismic velocity discontinuity at the lithosphere-asthenosphere boundary that was previously imaged using P-to-S (Ps) scattered energy in eastern North America. Exploration of the different sensitivities of Ps and Sp scattered energy suggests that the phases contain independent yet complementary high-resolution informati...

Stratified seismic anisotropy and the lithosphere- asthenosphere boundary beneath eastern North America

Long records of teleseismic observations accumulated at permanent seismic stations Harvard, MA; Palisades, NY; and Standing Stone, PA, in eastern North America are inverted for vertical distribution of anisotropic parameters. High-resolution anisotropy-aware P wave receiver function analysis and multiple-layer core-refracted SKS waveform modeling favor more than one layer of anisotropy beneath ...

The lithosphere–asthenosphere boundary and cratonic lithospheric layering beneath Australia from Sp wave imaging

Lithosphere, Asthenosphere, and Perisphere

"Lithosphere" is a mechanical concept implying strength and relative permanence. Unfortunately, the term has also been applied to the surface thermal boundary layer (TBL) and a shallow enriched geochemical reservoir, features having nothing to do with strength. The "strong" lithosphere is about one half the thickness of the TBL. The bottom of the elastic plate, the maximum depths of midplate an...

Anomalous seaward dip of the lithosphere–asthenosphere boundary beneath northeastern USA detected using differential-array measurements of Rayleigh waves

S U M M A R Y Rayleigh wave phase velocities and azimuth anomalies in the period range of 30–100 s are measured for a set of four triangular arrays of broad-band seismometers in coastal northeastern USA. This is a region in which a strong upper mantle slow shear velocity anomaly (a ‘New England Anomaly’), crosses the continental margin. Earthquakes from a wide range of directions are used to de...