The determination of the crustal structure is essential in geophysics, as it gives insight into the geohistory, tectonic environment, geohazard mitigation, etc. Here we present the latest advance on three-dimensional modeling representing the Tibetan Mohorovičić discontinuity (topography and ranges) and its deformation (fold), revealed by analyzing gravity data from GOCE mission. Our study show...

We analyze a large amount of receiver function data recorded by regional seismic networks of the China Earthquake Administration to estimate crustal structure and deformation beneath the southeast margin of the Tibetan plateau and its surrounding areas. We develop a comprehensive analysis method that facilitates robust extraction of azimuthal seismic anisotropy from receiver function data. The ...

This paper is primarily concerned with seismically imaging details in the mantle at an intermediate scale length between the large scales of regional and global tomography and the small scales of reflection profiles and outcrops. This range is roughly 0.1– 1 kmbab10–10 km, where a is the scale. We consider the implications of several models for mantle evolution in a convecting mantle, and possi...

[1] We determine the crustal and upper mantle structure of southern South America by inverting regional seismograms recorded by the Seismic Experiment in Patagonia and Antarctica. We present a waveform inversion method that utilizes a niching genetic algorithm. The niching genetic algorithm differs from the traditional genetic algorithm in that the inversion is performed in multiple subpopulati...

8 [1] The rapid rise of the central Andean plateau 9 between 10 and 6.8 Ma implies that mantle 10 lithosphere, including eclogitized lower crust, was 11 removed from beneath the region in that time interval; 12 we infer from that removal that the average viscosity 13 coefficient of mantle lithosphere was quite low when 14 removal occurred. Using scaling laws for the growth 15 of perturbations t...

The long-term stress-state of the lithosphere results from a combination of boundary forces, surface loads and tractions frommantle flow. Here, we have employed a numerical technique which allows for the selfconsistent treatment of the interaction between the lithosphere and mantle and takes into account the deformation of the free-surface. We have used this to study lithospheric dynamics in or...

I present a teleseismic waveform study of the lithospheric structure beneath the Tibetan Plateau, using data collected during the 1991-1992 SinoUS Tibet seismic recording experiment. Crustal thickness at each of the 11 broadband stations is estimated from the differential travel time between the Moho P -to-S converted phase and direct P . I demonstrated that this estimation is not sensitive to ...

[1] Lateral variations of the crustal structure in southern California are determined from receiver function (RF) studies using data from the Southern California Seismic Network broadband stations and Los Angeles Regional Seismic Experiment surveys. The results include crustal thickness estimates at the stations themselves, and where possible, cross sections are drawn. The large-scale Moho dept...

The crust and upper mantle beneath the New England Appalachians exhibit a large offset of Moho across boundary between Laurentia accreted terranes several dipping discontinuities, which reflect Paleozoic or younger tectonic movements. We apply scattered wavefield migration to SEISConn array deployed northern Connecticut obtain insights not previously available from receiver function studies. re...