Gross errors in upper-mantle discontinuity topography from underside reflection data

Upper mantle discontinuity topography from thermal and chemical heterogeneity.

Using high-resolution stacks of precursors to the seismic phase SS, we investigated seismic discontinuities associated with mineralogical phase changes approximately 410 and 660 kilometers (km) deep within Earth beneath South America and the surrounding oceans. Detailed maps of phase boundary topography revealed deep 410- and 660-km discontinuities in the down-dip direction of subduction, incon...

Supporting Online Material for Upper Mantle Discontinuity Topography from Thermal and Chemical Heterogeneity

Crust and upper mantle discontinuity structure beneath eastern North America

[1] Crust and mantle discontinuities across the eastern margin of the North American craton were imaged using P to S converted phase receiver functions recorded by the Missouri to Massachusetts Broadband Seismometer Experiment. Crustal structure constrained by modeling Moho conversions and reverberations shows a variation of Moho depth from a minimum of 30 km near the Atlantic coast to depths o...

Reflectors in Upper Mantle

REFLECTORS IN UPPER MANTLE ABOVE THE DEEP EARTHQUAKES

Investigation of upper mantle discontinuity structure beneath the central Pacific using SS precursors

Figures S1-S9 show topologies for stacking parameters not explored in Figure 14 of the manuscript, and may be of interest to the reader. These additional plots demonstrate the agreement between topologies across the different stacking parameters, such as the corner frequency of the low-pass filter, correction models, and SNR value. The stacking geometry in all the supplemental plots is 80 10-de...