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Showing 58351 to 58400 of 59105 works

Iterative Strategies for Aftershock Classification in Automatic Seismic Processing Pipelines

Aftershock sequences following very large earthquakes present enormous challenges to near‐real‐time generation of seismic bulletins. The increase in analyst resources needed to re…

How do we understand and visualize uncertainty?

Geophysicists are often concerned with reconstructing subsurface properties using observations collected at or near the surface. For example, in seismic migration, we attempt to r…

Three-dimensional variations in Love and Rayleigh wave azimuthal anisotropy for the upper 800 km of the mantle

We present a new mantle model (YB14SHani) of azimuthal anisotropy for horizontally polarized shear waves (SH) in parallel with our previously published vertically polarized shear …

Structure and anisotropy of the Mexico subduction zone based on Rayleigh-wave analysis and implications for the geometr…

We develop a three-dimensional model of shear wave velocity and anisotropy for the Mexico subduction zone using Rayleigh wave phase velocity dispersion measurements. This region i…

Radial anisotropy and prior petrological constraints: A comparative study

Radial seismic anisotropy models are traditionally obtained using empirical constraints based on laboratory experiments and petrological considerations. We tested the hypothesis t…

Radial anisotropy in seismic reference models of the mantle

Sambridges Neighborhood Algorithm was applied to normal mode and surface wave phase velocity data to determine the likelihood of radial anisotropy in mantle reference models. This…

Changes in Seismic Anisotropy Shed Light on the Nature of the Gutenberg Discontinuity

The boundary between the lithosphere and asthenosphere is associated with a plate-wide high seismic velocity “lid” overlying lowered velocities, consistent with thermal models. Se…

Robust Normal Mode Constraints on Inner-Core Anisotropy from Model Space Search

A technique for searching full model space that was applied to measurements of anomalously split normal modes showed a robust pattern of P-wave and S-wave anisotropy in the inner …

Seismic anisotropy changes across upper mantle phase transitions

The mantle transition zone is believed to play an important role in the thermochemical evolution of our planet and in its deep water cycle. Constraining mantle flow at these depth…

Depth constraints on azimuthal anisotropy in the Great Basin from Rayleigh-wave phase velocity maps

We present fundamental-mode Rayleigh-wave azimuthally anisotropic phase velocity maps obtained for the Great Basin region at periods between 16 s and 102 s. These maps offer the f…

Probability density functions for radial anisotropy: implications for the upper 1200 km of the mantle

The presence of radial anisotropy in the upper mantle, transition zone and top of the lower mantle is investigated by applying a model space search technique to Rayleigh and Love …

A Bayesian approach to assess the importance of crustal corrections in global anisotropic surface wave tomography

Several recent studies have demonstrated the importance of crustal corrections when inverting surface wave data to model lateral variations in mantle radial anisotropy. It has als…

Surface wave array tomography in SE Tibet from ambient seismic noise and two-station analysis - II. Crustal and upper-m…

We determine the 3-D shear wave speed variations in the crust and upper mantle in the southeastern borderland of the Tibetan Plateau, SW China, with data from 25 temporary broad-b…

The signal of mantle anisotropy in the coupling of normal modes

We investigate whether the coupling of normal mode (NM) multiplets can help us constrain mantle anisotropy.We first derive explicit expressions of the generalized structure coeffi…

Probability density function for radial anisotropy from fundamental mode surface wave data and the Neighbourhood Algori…

We applied Sambridges Neighbourhood Algorithm (NA) to degree-8 fundamental mode Love and Rayleigh wave phase velocity maps between 40 and 150 s to find models of radial anisotropy…

P and S tomography using normal-mode and surface waves data with a neighbourhood algorithm

Traditionally P- and S-wave tomography has been based on the inversion of data that are sensitive to the desired Earth structure, and model covariance is estimated from imperfect …

Locating Seismicity on the Arctic Plate Boundary Using Multiple-Event Techniques and Empirical Signal Processing

The oceanic boundary separating the Eurasian and North American plates between 70 and 84 degrees North hosts large earthquakes which are well recorded teleseismically, and many mo…

The Applicability of Incoherent Array Processing to IMS Seismic Arrays

The seismic arrays of the International Monitoring System (IMS) for the Comprehensive Nuclear-Test-Ban Treaty (CTBT) are highly diverse in size and configuration, with apertures r…

The 11 October 2010 Novaya Zemlya Earthquake: Implications for Velocity Models and Regional Event Location

Characterizing the seismicity of Novaya Zemlya and the surrounding Arctic seas requires accurate event‐location estimates. Low‐magnitude events in this region are currently observ…

Formation of a cohesive floodplain in a dynamic experimental meandering river

Field studies suggest that a cohesive floodplain is a necessary condition for meandering in contrast to braided rivers. However, it is only partly understood how the balance betwe…

Compositional Signatures in Acoustic Backscatter Over Vegetated and Unvegetated Mixed Sand-Gravel Riverbeds

Multibeam acoustic backscatter has considerable utility for remote characterization of spatially heterogeneous bed sediment composition over vegetated and unvegetated riverbeds of…

Accurate relative location estimates for the North Korean nuclear tests using empirical slowness corrections

Declared North Korean nuclear tests in 2006, 2009, 2013 and 2016 were observed seismically at regional and teleseismic distances. Waveform similarity allows the events to be locat…

Illuminating the seismicity pattern of the October 8, 2005, M = 7.6 Kashmir earthquake aftershocks

The M=7.6 October 8, 2005, Kashmir earthquake generated thousands of aftershocks. Existing catalogs are coarse, omitting data from key stations and not correcting bias. We target …

A systematic study of earthquake detectability using Sentinel-1 Interferometric Wide-Swath data

The Sentinel-1 mission comprises two synthetic aperture radar satellites, each with a 12 day orbital repeat, orbiting 6 days apart within a narrow tube. The mission design promise…

Location and probability of shoal margin collapses in a sandy estuary

Channel bank failure, collapses of shoal margins and beaches due to flow slides have been recorded in Dutch estuaries for the past 200 years but have hardly been recognized elsewh…

Effects of spatial resolution on slope and aspect derivation for regional-scale analysis

This paper investigates differences between morphometric parameters (slope and aspect) derived from a resampled DEM and resampled morphometric data derived from a medium resolutio…

Geological applications of digital terrain analysis

Editorial to the IJGIS Special Issue on "Geological applications of digital terrain analysis". In this volume, the modern advances in the field of geological terrain analysis are …

A dimensionless statistical analysis of logjam form and process

Large wood in rivers and logjams are linked to the presence of varied riverine morphologies and increased abundance and diversity of aquatic biota. Current research into the ecohy…

The Planform Mobility of River Channel Confluences: Insights from Analysis of Remotely Sensed Imagery

River channel confluences are widely acknowledged as important geomorphological nodes that control the downstream routing of water and sediment, and which are locations for the pr…

Influence of cell size on volume calculation using digital terrain models: A case of coastal dune fields

In this work, we analyze how variation in cell size influences the volume calculated from Digital Terrain Models (DTMs) derived from a LiDAR (Light Detection and Ranging) survey i…

Reactivation of intrabasement structures during rifting - A case study from offshore southern Norway

Pre-existing structures within crystalline basement may exert a significant influence over the evolution of rifts. However, the exact manner in which these structures reactivate a…

A linear dynamical systems approach to streamflow reconstruction reveals history of regime shifts in northern Thailand

Catchment dynamics is not often modeled in streamflow reconstruction studies; yet, the streamflow generation process depends on both catchment state and climatic inputs. To explic…

Determining geophysical responses from burials in graveyards and cemeteries

Graveyards and cemeteries around the world are increasingly designated as full. There is therefore a requirement to identify vacant spaces for new burials or to identify existing…

Multi-scale Analysis of Topographic Surface Roughness in the Midland Valley, Scotland

Surface roughness is an important geomorphological variable which has been used in the earth and planetary sciences to infer material properties, current/past processes and the ti…

Constraining the sedimentology and stratigraphy of submarine intraslope lobe deposits using exhumed examples from the K…

Intraslope lobe deposits provide a record of the infill of accommodation on submarine slopes and their recognition enables the accurate reconstruction of the stratigraphic evoluti…

Trends and distribution of drug-related and associated events: A case study of Vilnius

Abstract. This case study provides an analysis on a concerning social issue in Lithuania. The author’s recent research suggests that the use of drugs in the country is on the rise…

CascadeCBF: Probabilistic Counting for Sparse Spatial Point Clouds

Abstract. Spatial point datasets often exhibit longtail distributions, where few locations receive most observations. Traditional counting Bloom filters struggle with such distrib…

Preface

We are pleased to welcome you to Tartu, Estonia, for the AGILE 2026 conference.This year's theme, "Smart Data: Making geospatial data actionable," highlights the growing importanc…

Fuzzy Meta Indices: A Bikeability Case Study in Augsburg

Abstract. Biking as an active way of travelling has many benefits and many cities try to promote it. The first step to informed decisions that increase the bikeability of a city’s…

Food Insecurity Projections for Anticipatory Action: Comparative Spatiotemporal Analysis of FEWS NET and the IPC in Som…

Abstract. Anticipatory Action (AA) has become a central pillar of contemporary humanitarian action, aiming to reduce the impacts of climate-related hazards by enabling preventive …

“Flags of Deceit:” Re-Flagging Trends among Sanctioned Ships in the Russian Shadow Fleet

Abstract. Since the beginning of its invasion of Ukraine, Western nations have imposed sanctions on Russian trade, in particular its fleet of oil tankers. To evade these sanctions…

Analysis of the spatial and temporal pattern of COVID-19 incidence rate across Germany

Abstract. The COVID-19 pandemic has caused severe public health issues at a global scale. However, effects were not spatially homogeneous. We analyzed how five selects socio-econo…

Counterfactual Modelling for Evaluating Pipeline Replacement Strategies

Abstract. Water utilities companies increasingly rely on predictive models to prioritise pipeline replacement, yet they rarely evaluate whether these decisions actually prevent fa…

Investigating the Generalizability of Segment Anything Model for Large-Scale Geospatial Segmentation

Abstract. Foundation Models (FMs) are promising approaches in multimodal artificial intelligence as they provide foundational task knowledge across computer vision, language under…

A comparison of generalised urban block 3D model variants considering attributes with an influence on urban analyses

Abstract. Three-dimensional (3D) city models support geometry-sensitive urban analyses related to energy demand, material stocks, and urban climate. While modelling decisions at t…

Turning Geospatial Data into Planning Decisions: Evaluating a Participatory Accessibility Model for Urban Drinking Water

Abstract. Spatial accessibility models are widely used in infrastructure planning, yet quantitative evaluation against lived access conditions remains rare. This study implements …

Assessing Perceived Walkability: a case study using eye-tracking and think-aloud with street images

Abstract. GIS has been widely used to measure objective walkability at the city and street levels. However, perceived walkability is mostly assessed at the city or neighborhood sc…

Object-Level Detection of Hand-Drawn Annotations in Participatory Sketch Maps Using Paired Clean and Annotated Basemaps

Abstract. Automatic extraction of hand-drawn annotations from participatory sketch maps is essential for digitising community-generated spatial information but remains challenging…

The potential of street-level and 3D views: Making public participation in urban planning more accessible to people wit…

Abstract. Tools for public participation in urban planning processes often assume basic map literacy. People with cognitive disabilities are therefore usually excluded. This work …

Towards National-Scale Ecological Applications: Harmonised Framework for LiDAR Point Cloud Processing for Vegetation Me…

Abstract. National airborne laser scanning (ALS) datasets provide essential three-dimensional information for large-scale vegetation metric calculation, but their ecological use i…

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