Results 41 to 50 of about 227 (164)

Identification of invisible damage in prestressed concrete bridges—A demonstrator case using coda wave interferometry

Structural Concrete, EarlyView.
Abstract During their life cycle, prestressed concrete bridges are prone to wire breaks of their tendons due to fatigue or stress corrosion cracking. However, not all structures show visible cracking on the surface, which would provide timely warning of otherwise invisible damage. Brittle failure may occur.
Noah Sträter, Felix Clauß, Mark Alexander Ahrens, Peter Mark   +3 more
wiley   +1 more source

Interaction of Air Pressure and Groundwater as Main Cause of Sub‐Daily Relative Seismic Velocity Changes

Geophysical Research Letters, 2023
Our study investigates variations of seismic velocity that occur over short time scales of hours. We use coda wave interferometry to inspect 5 months of continuous data from a seismological array in southern Germany.
R. Kramer, Y. Lu, G. Bokelmann
doaj   +1 more source

Seismic Velocity Variations Illustrate Hydrological and Ecohydrological Processes in a Mountain Watershed

Geophysical Research Letters, Volume 53, Issue 12, 28 June 2026.
Abstract We employ passive seismic interferometry to study seismic hydrological responses in a snowmelt‐driven, semi‐arid catchment. Seismic velocity changes (dv/v) at 2–4 Hz and 4–8 Hz are analyzed from six stations along a hillslope transect between May and November 2023 and compared to precipitation, soil moisture, and groundwater level timeseries ...
Kuan‐Fu Feng, Fan‐Chi Lin, Sara Warix, Paul D. Brooks, Qicheng Zeng, Tonie van Dam   +5 more
wiley   +1 more source

Coda wave interferometry to monitor the evolution of rock mass damage and saturation in Opalinus Clay: a study at the Mont Terri Underground Laboratory [PDF]

Swiss Journal of Geosciences
We explore the potential to monitor the evolution and extent of structurally controlled rock mass damage in faulted Opalinus Clay shale at the Mont Terri Underground Rock Laboratory (MT URL) using coda wave interferometry.
Anne Obermann, Martin Ziegler
doaj   +3 more sources

Feasibility of Crosshole Seismic Tomography for Monitoring In Situ CO2 Mineral Storage in Basalts: A Rock Physics‐ and Seismic Modeling Study

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 6, June 2026.
Abstract In situ CO2 mineral storage is gaining increasing attention as a carbon capture and storage (CCS) technology to reduce anthropogenic CO2 emissions. So far, in situ CO2 mineral storage projects have been monitored predominantly using fluid‐ and isotope geochemical methods.
Jonas Simon Junker, Hansruedi Maurer, Alba Zappone, Sin‐Mei Wu, Anne Obermann   +4 more
wiley   +1 more source

Linking Stress Drop and Slip Heterogeneity to Assess Source Rupture Directivity for Earthquakes in Central Italy

Terra Nova, Volume 38, Issue 3, Page 163-172, June 2026.
ABSTRACT In this study, we examine the relationship between Brune stress drop and fault slip where the stress drop is estimated using the Empirical Green's Function (EGF) method and slip distribution is derived from seismic and geodetic data inversion.
Giovanna Calderoni, Antonella Cirella, Aybige Akinci   +2 more
wiley   +1 more source

Wave-Screening Methods for Prestress-Loss Assessment of a Large-Scale Post-Tensioned Concrete Bridge Model Under Outdoor Conditions

Applied Sciences
This paper presents advancements in structural health monitoring (SHM) techniques, with a particular focus on wave-screening methods for assessing prestress loss in a large-scale prestressed concrete (PC) bridge model under outdoor conditions.
Chun-Man Liao, Felix Bernauer, Ernst Niederleithinger, Heiner Igel, Céline Hadziioannou   +4 more
doaj   +1 more source

Decoupling Seasonal Seismic Velocity Changes on Slow‐Moving Slopes in Southwest China Using Tree Ensemble Machine Learning

Geophysical Research Letters, Volume 53, Issue 9, 16 May 2026.
Abstract Changes in seismic properties can help assess slope damage, which is influenced by external factors such as temperature, relative humidity, rainfall, air pressure, and local seismicity. However, the contributions of these factors, and how the dominant factor modulates transient and seasonal seismic velocity changes (δv/v $\delta v/v$), remain ...
Dekang Li, Fan Xie, Qing‐Yu Wang, Piero Poli, Clément Hibert, Yifei Cui, Li Li, Hengshu Zhu   +7 more
wiley   +1 more source

Evidence for a Sharp, Negative Velocity Gradient at the Lithosphere Asthenosphere Boundary From Array Analysis of Ambient Noise Autocorrelograms Near Sweetwater, Texas

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 5, May 2026.
Abstract We use array analysis of auto‐ and cross‐correlations of ambient noise recorded by closely‐spaced station pairs in a dense array near Sweetwater, Texas to image the P‐wave reflectivity of Earth's upper mantle structure. Imaging was performed with 18 linear arrays, each comprised of 80–100 Fairfield Nodal vertical‐component instruments that ...
Yashwant Soni, Jay Pulliam
wiley   +1 more source

Autocorrelation Seismic Imaging of Northern Taiwan Using Ambient Noise Data

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 5, May 2026.
Abstract Over the past few million years, northern Taiwan records a tectonic history of subduction to arc–continent collision followed by post‐collisional collapse. This evolution motivates constraints on crustal structure, including crustal layering and thickness.
Mei Chien, Alan Levander, Po‐Fei Chen
wiley   +1 more source