Near-surface seafloor properties affect offshore mining and infrastructure engineering. Shallow sediments experience extremely low effective stress, consequently, these exhibit very in-situ density, shear wave velocity, stiffness. We combined data extracted from the literature with new laboratory field results to develop a comprehensive understanding of shallow sediments. First, we explored sed...

Teleseismic P-wave receiver functions and surface-wave dispersion measurements can be employed to simultaneously infer the shear-wave velocity distribution with depth in the lithosphere. Receiver functions are primarily sensitive to shear-wave velocity contrasts and vertical travel times and surface-wave dispersion measurements are sensitive to vertical shear-wave velocity averages, so that the...

Receiver functions calculated from a ten-station subset of the Earthscope Transportable Array (TA) show a well-defined 45 km thick low-velocity layer atop the 410-km discontinuity (“410”) beneath the Tucson, Arizona, region. This observation is consistent with a previously detected layer of increased electrical conductivity in the same region, from which the existence a 5-30 km thick layer of p...

The D′′ region in the lowermost mantle beneath the Caribbean and Central America is investigated using shear waves from South American earthquakes recorded by seismic stations in North America. We present a large-scale, composite study of volumetric shear velocity heterogeneity, anisotropy, and the possible presence of a D′′ discontinuity in the region. Our data set includes: 328 S(Sdiff )-SKS ...

Dense hydrous magnesium silicate (DHMS) phase E is a potential water carrier in subducting slabs that can transport to the Earth's deep mantle between bottom of upper and uppermost transition zone. Therefore, knowledge on high pressure‒temperature (P‒T) full elastic moduli at relevant conditions important deciphering existence DHMS phases their influences seismic profiles region; however, P‒T e...