Abstract. We present a methodology to compute 3-D global seismic wavefields for realistic earthquake sources in visco-elastic anisotropic media, covering applications across the observable frequency band with moderate computational resources. This is accommodated by mandating axisymmetric background models that allow multipole expansion such only 2-D domain needed, whereas azimuthal third dimension computed analytically on fly. dimensional collapse opens doors storing space–time disk can be...

We present SubMachine, a collection of web-based tools for the interactive visualization, analysis, and quantitative comparison global-scale data sets Earth's interior. SubMachine focuses on making regional seismic tomography models easily accessible to wider solid Earth community, in order facilitate collaborative exploration. have written software visualize explore over 30 models-individually, side-by-side, or through statistical averaging tools. also serves various nontomographic that are...

Abstract. We present a new method and implementation (Instaseis) to store global Green's functions in database which allows for near-instantaneous (on the order of milliseconds) extraction arbitrary seismograms. Using axisymmetric spectral element (AxiSEM), generation these databases, based on reciprocity functions, is very efficient approximately half as expensive single AxiSEM forward run. Thus, this enables computation full databases at cost seismograms source previous scheme compute...

SUMMARY In global-scale seismic tomography, teleseismic P and PP waves mainly constrain structures in the upper two thirds of mantle, whereas core-diffracted (Pdiff) lower third. This study is first to invert a very large data set Pdiff waves, up highest possible frequencies. results tomographic resolution matching exceeding that global S-wave tomographies, which have long been models choice for interpreting lowermost mantle structure. We present three new tomography 3-D isotropic P-wave...

In this study, we integrate bedrock datasets, observations of subducted slabs in the mantle, and plate kinematic constraints to constrain models for India-Asia collision central Tethys oceans. To accomplish this, review: (1) post-Triassic record subduction Tibet; (2) seismic tomographic imaging mantle; (3) timing collision; (4) pre-collisional size Greater India. Following assumption that sink vertically through their positions geometries determined from tomography locations kinematics...

The geoscience community is increasingly utilizing seismic tomography to interpret mantle heterogeneity and its links past tectonic geodynamic processes. To assess the robustness distribution of positive anomalies, inferred as subducted slabs, we create a set vote maps for lower with 14 global P-wave or S-wave models. Based on depth-dependent threshold metric, an average 20% any given model depth identified potential slab. However, upon combining models, most consistent wavespeed features...

A growing volume of heritage data is being digitized and made available as text via optical character recognition (OCR).Scholars libraries are increasingly using OCR-generated for retrieval analysis.However, the process creating through OCR introduces varying degrees error to text.The impact these errors on natural language processing (NLP) tasks has only been partially studied.We perform a series extrinsic assessment -sentence segmentation, named entity recognition, dependency parsing,...

We present a novel numerical method to simulate global seismic wave propagation in realistic aspherical 3-D earth models across the observable frequency band of data. Our method, named AxiSEM3D, is hybrid spectral element (SEM) and pseudospectral method. It describes azimuthal dimension wavefields with substantially reduced number degrees freedom via Fourier series parametrization, which terms can be locally adapted inherent complexity wavefields. AxiSEM3D allows for material...

Abstract Plate reconstructions since the breakup of Pangaea are mostly based on preserved spreading history ocean basins, within absolute reference frames that constrained by a combination age‐progressive hotspot tracks and paleomagnetic data. The evolution destructive plate margins is difficult to constrain from surface observations as much evidence has been subducted. Seismic tomography can directly paleotrench locations imaging subducted lithosphere in mantle. This new evidence, combined...

Abstract. RHUM-RUM is a German-French seismological experiment based on the sea floor surrounding island of La Réunion, western Indian Ocean (Barruol and Sigloch, 2013). Its primary objective to clarify presence or absence mantle plume beneath Reunion volcanic hotspot. RHUM-RUM's central component 13-month deployment (October 2012 November 2013) 57 broadband ocean bottom seismometers (OBS) hydrophones over an area 2000 × km2 The array contained 48 wideband OBS from German DEPAS pool 9 French...

Abstract. We present obspyDMT, a free, open-source software toolbox for the query, retrieval, processing and management of seismological data sets, including very large, heterogeneous and/or dynamically growing ones. ObspyDMT simplifies speeds up user interaction with centers, in more versatile ways than existing tools. The is shielded from complexities interacting different centers exchange protocols provided powerful diagnostic plotting tools to check retrieved metadata. While primarily...

Abstract Distributions of slabs within Earth's mantle are increasingly used to reconstruct past subduction zones, based on first‐order assumptions that sink vertically after slab break‐off, and thus delineate paleo‐trench locations. Non‐vertical motions, which occur prior represent a potentially significant source error for slab‐based plate reconstructions, but poorly understood. We constrain lateral migration the Indian overlying India‐Asia collision zone by comparing tomographically imaged...

The lower third of the mantle is sampled extensively by body waves that diffract around earth's core (Pdiff and Sdiff phases), which could deliver highly resolved tomographic images this poorly understood region. But core-diffracted waves—especially Pdiff waves—are not often used in tomography because they are difficult to model adequately. Our aim make usable for global waveform tomography, across their entire frequency range. Here we present data processing part effort. A method...

SubMachine is a collection of web-based tools for the interactive visualisation, analysis, and quantitative comparison global-scale datasets Earth's interior [1]. It focuses on making regional global seismic tomography models easily accessible to wider solid Earth community facilitate collaborative exploration. Over 30 can be visualised explored—individually, side-by-side, or through statistical averaging tools. also serves diverse non-tomographic datasets, including plate...

Introduction Recent advancements in sensor technologies have enabled collection of many large, high-resolution plant images datasets that could be used to non-destructively explore the relationships between genetics, environment and management factors on phenotype or physical traits exhibited by plants. The data captured these then integrated into models development crop yield more accurately predict how plants may grow as a result changing practices climate conditions, better ensuring...

This article presents an analytical solution for the mechanical behaviour of rectangular plates made functionally graded materials (FGMs) based on first-order shear deformation theory (FSDT) and third-order (TSDT). The FGM plate is assumed to be across thickness. material properties are vary continuously through thickness according a power law distribution volume fraction constituent materials, except Poisson's ratio, which constant. subjected lateral load its upper surface. equations motion...

We present DeezyMatch, a free, open-source software library written in Python for fuzzy string matching and candidate ranking. Its pair classifier supports various deep neural network architectures training new classifiers fine-tuning pretrained model, which paves the way transfer learning matching. This approach is especially useful where only limited examples are available. The learned DeezyMatch models can be used to generate rich vector representations from inputs. ranker component uses...

Abstract. We present a methodology to compute 3-D global seismic wavefields for realistic earthquake sources in visco-elastic anisotropic media, covering applications across the observable frequency band with moderate computational resources. This is accommodated by mandating axisymmetric background models which allow multipole expansion such that only 2-D domain needed, whereas azimuthal third dimension computed analytically on-the-fly. dimensional collapse opens doors storing space-time on...

Abstract We analyze mantle structure under South America in the DETOX‐P1 seismic tomography model, a global‐scale, multifrequency inversion of teleseismic P waves. inverts most extensive data set broadband, waveform‐based traveltime measurements to date, complemented by analyst‐picked traveltimes from ISC‐EHB catalog. The is sampled ∼665,000 cross‐correlation measured on 529 American broadband stations and 5,389 elsewhere. By their locations, depths, geometries, we distinguish four...