Showing papers in "Physics of the Earth and Planetary Interiors in 2019"

TL;DR: In this paper, a CNN-based phase identification classifier (CPIC) was proposed for phase detection and picking on small to medium sized training datasets, and applied to one-month continuous recordings during the aftershock sequences of the 2008 M_W 7.9 Wenchuan Earthquake in Sichuan, China, CPIC detects 97.5% of the manually picked phases in the standard catalog and predicts their arrival times with a five times improvement over the ObsPy AR picker.

TL;DR: In this article, a broad region in the upper mantle and upper part of the mantle transition zone (MTZ) overlying the long stagnant Pacific slab is defined, which can explain the deep origin of the Tengchong volcano and generation of large crustal earthquakes in the region.

TL;DR: The Gruneisen parameter, γ as mentioned in this paper, can also be presented in terms of elastic moduli and their pressure derivatives, providing a quantitative link between thermal and mechanical parameters.

TL;DR: In this article, the authors quantify volatile capture from an atmosphere derived from the solar nebula during accretion, using a boundary layer model of magma ocean dynamics coupled to a nebular atmosphere model adapted to Earth formation.

TL;DR: In this article, a joint inversion of receiver functions and surface wave dispersion with P-velocity constraints is applied to a dense array in the Cathaysia block, and the specific crustal Vp/Vs ratios obtained from a generalized H-κ stacking method are introduced to the traditional joint-inversion for passive seismic stations.

TL;DR: In this paper, the authors used the Fast Marching Tomography software package to retrieve 3-D velocity and interface structures from starting 1-dimensional velocity and Moho models and applied a machine learning algorithm that clusters earthquakes depending on their spatiotemporal density.

TL;DR: In this article, a global geomagnetic field model based on the simultaneous inversion of historical, archaeomagnetic, and volcanic records, using a Bayesian approach with minimal-committing time regularization that minimizes the energy of secular variation is presented.

TL;DR: In this paper, the authors derived scaling laws valid for the entire planet evolution using fully dynamic 2-D and 3-D models using strong temperature-dependent viscosity, mixed heating with radio element decay, spherical geometry.

TL;DR: In this paper, a slab warping model is proposed to describe the complex subduction of the Indian plate beneath the plateau, which is characterized by lateral bending in addition to downward subduction.

TL;DR: In this article, Singular Spectral Analysis (SSA) has been used to identify irregular (quasi-periodical) oscillatory components of Earth's rotation velocity, and the first 16 eigenvalues uncovered by SSA correspond to 10 components, all with physical sense.

TL;DR: In this paper, the first P-wave anisotropic tomography of the crust and upper mantle of the central and southern Philippines is obtained by inverting a large number of local earthquakes and teleseismic events, which sheds new light on the geodynamic evolution of the study region.

TL;DR: In this article, the zero order minimum entropy stabilizing functional is proposed for focusing inversion of gravity data based on a reweighted regularized conjugate gradient algorithm, which avoids the selection of an optimal focusing parameter and generates piecewise-constant models.

TL;DR: In this paper, the effects of nickel and light elements on properties of iron alloys using the same experimental methods and data analysis approach were investigated and it was shown that the shape of the phonon DOS of these alloys remains similar with increasing pressure.

TL;DR: In this article, the authors have augmented the existing database of ballistic PKP travel times by sampling the deep inner core along equatorial directions and found that, while the slowest velocity is observed in a direction that changes with depth, the fast symmetry axis remains quasi-parallel to the Earth's rotation axis at all depths in the inner core, as previously found in most other ballistic studies.

TL;DR: In this paper, the authors compile results from 40 studies of post-earthquake motions, augmented by ten studies of contemporary surface loading or unloading, that illuminate current estimates of transient and steady-state viscosity of the lower crust and/or uppermost mantle.

TL;DR: In this article, the influence of water and pressure on the deformation of hydrated olivine single crystal is analyzed using a flow law of the form e i = e i dry + e i wet with (i:slip system).

TL;DR: In this paper, the authors use suites of numerical experiments to show how long wavelength flow and the operation of plate tectonics can generate and maintain an asthenosphere, and how an anasthenosphere can maintain long-wavelength flow and plate-tectonics.

TL;DR: In this article, the authors estimate the fault model of the 2 September 2009 Tasikmalaya intraslab earthquake based on the GPS data available in western Java, Indonesia, using the focal mechanism of the earthquake was used to help construct two possible fault models: a west-dipping fault with a strike of 160.8° and an east-ding fault with strike of 34.0°.

TL;DR: In this article, the authors investigate the main mechanisms that contribute to the growth of the volume of the continental crust and analyze the effect of the oceanic plate speed, depending on the area and thickness of thermally insulating continents.

TL;DR: In this article, a comprehensive GIS mapping integrated with geophysical and geophysical data (magnetic and gravimetric) is presented to reveal the interplay between magmatism and volcanic activity, intra-mountain basin development and large-scale faulting/tectonic features in the post-collisional setting of the East Carpathians.

TL;DR: In this article, a 3D S-wave velocity model of the crust and uppermost mantle is constructed through ambient noise tomography, which is used to investigate the deep origin of Cenozoic intraplate volcanism in Northeast China, especially Wudalianchi volcano.

TL;DR: In this paper, a 2.5-dimensional dislocation dynamics approach is employed to model the viscosity of the lower mantle of aluminous (Mg,Fe)SiO_3 bridgmanite and ferropericlase.

TL;DR: In this article, a detailed tomographic model of 3D P-wave azimuthal anisotropy in the crust and upper mantle beneath the New Madrid seismic zone (NMSZ) was determined using a large number of high-quality arrival-time data of 877 local earthquakes and relative travel time data of 1511 teleseismic events recorded at 62 USArray stations.

TL;DR: In this article, a model of the upper mantle structure of the Arctic region based on a representative dataset of Rayleigh wave group velocity dispersion curves from 10 to 250 years was presented.

TL;DR: In this article, the authors model the gravity anomaly using radially averaged power spectrum, depth from extreme points (DEXP) method, wavelength filtering, and 3D structural inversion to constrain crustal structure of the Proterozoic Delhi fold belt (DFB) in NW India.

TL;DR: In this article, a stochastic crustal composition model utilizing Bayesian inference is proposed for geoneutrino flux prediction with probabilistic error estimation in a reproducible way.

TL;DR: In this paper, a crustal and uppermost mantle shear-wave velocity model was obtained from the joint analysis of Rayleigh wave phase dispersions and teleseismic P-wave receiver functions at 188 broadband seismic stations deployed in this region.

TL;DR: In this article, the authors determined dehydration curves for FeOOH and AlOOH in upper mantle and mantle transition zone conditions by quench and in situ X-ray diffraction to constrain their capability of water transport to the deep mantle.

TL;DR: In this paper, the authors reviewed the tomographic studies in the past three decades that made use of the later phase data, which illuminate the Earth's interior structure that is not well sampled by the first waves.

TL;DR: In this paper, the authors use two-dimensional models of mantle convection in a Mars-like planet and a simple parameterized representation of the principal effects of impacts to study some of the dynamical effects and interactions of multiple large impacts.