Results 71 to 80 of about 1,726,373 (224)

Area-Specific Seismic Noise Reference Curves in an Urban Volcanic Environment: The Campi Flegrei Case

Geosciences
This study investigates the seismic ambient noise within the Campi Flegrei caldera (Naples, Italy) to improve the detection capability and reliability of the earthquake monitoring system managed by the INGV, Osservatorio Vesuviano.
Roberta Esposito, Lucia Nardone, Roberto Manzo, Guido Gaudiosi, Massimo Orazi   +4 more
doaj   +1 more source

Cross‐Entropy of Power Spectral Density Function: A Modal Identification Framework

Earthquake Engineering &Structural Dynamics, Volume 55, Issue 12, Page 3012-3028, 10 October 2026.
ABSTRACT The power spectral density (PSD) function of measured structural response contains a significant amount of information, including the modal parameters (natural frequencies, damping ratios). Output‐only system identification or modal identification technique can be used for extracting such modal parameters from the measured response or its ...
Su‐Hong Kim, Jae‐Seung Hwang, Dae‐Kun Kwon, Ahsan Kareem   +3 more
wiley   +1 more source

Development of a State-Wide Velocity Profile in Oklahoma Using Ambient Noise Seismic Tomography [PDF]

, 2018
Earthquakes have been a growing concern in the state of Oklahoma in the last several years and as a result, prediction of the ground motion, understanding of subsurface geological structure, and the estimation of accurate earthquake location are of ...
Marsh, Stephen
core  

Did they blow it? Time-lapse velocity variations during an open-pit mine slope failure using seismic noise interferometry

Seismica
Landslides are geological events that directly impact thousands of people every year and cause significant loss of life. Landslides are often triggered by extreme weather events or earthquakes.
Tjaart de Wit, Roelof Snieder
doaj   +1 more source

Dimensionality Reduction Techniques for Analyzing Tsunami Simulations in Hazard Assessment and Forecasting Applications

Journal of Geophysical Research: Machine Learning and Computation, Volume 3, Issue 5, October 2026.
Abstract A wide selection of linear and non‐linear dimensionality reduction techniques is evaluated on synthetic tsunami data that is the basis for tsunami hazard assessment and computational forecasting. The data were computed from earthquake rupture forecasts (ERFs) supplying initial generation conditions and a linear long‐wave Green's function ...
Eric L. Geist, Tom Parsons
wiley   +1 more source

Analysing the Earth's near surface using ambient seismic noise

, 2018
Near surface measurements of seismic velocity and Q are useful in a number of situations, for example for when carrying out re-datuming and migration for depth images, or when analysing ground conditions for building.
Allmark, Claire Lindsay
core   +3 more sources

Research on a Deep Learning‐Based Inversion Method for Surface Wave Dispersion Spectra

Journal of Geophysical Research: Machine Learning and Computation, Volume 3, Issue 5, October 2026.
Abstract The near‐surface shear‐wave velocity structure is crucial for geological engineering and near‐surface exploration. Surface wave inversion is a key technique for obtaining the velocity structure, but traditional methods suffer from limitations such as heavy reliance on the initial model, high computational cost, and susceptibility to local ...
Yunwei Zhang, Yanyang Song, Xiaofei Chen
wiley   +1 more source

Crustal Shear‐Wave Velocity and Azimuthal Anisotropy Imaging Reveals the Merapi‐Merbabu‐Telomoyo Volcanic Chain, Central Java

Geophysical Research Letters, Volume 53, Issue 18, 28 September 2026.
Abstract We present new results from ambient noise tomography and azimuthal anisotropy analysis of the DOMERAPI data set to investigate crustal structure beneath the Merapi‐Merbabu‐Telomoyo region in central Java. The 3D shear‐wave velocity (Vs) model reveals a prominent high‐Vs anomaly extending from south of Merapi through Merbabu to Telomoyo ...
Iqwal Ramadhan, Sri Widiyantoro, Zulfakriza, Jean‐Philippe Metaxian, Nicholas Rawlinson, Jean‐Paul Montagner, Tedi Yudistira   +6 more
wiley   +1 more source

Ambient noise tomography with a large seismic array

Comptes Rendus. Géoscience, 2011
The emergence of large-scale arrays of seismometers across several continents presents the opportunity to image the Earth's structure at unprecedented resolution, but methods must be developed to exploit the capabilities of these deployments.
Michael H. Ritzwoller, Fan-Chi Lin, Weisen Shen   +2 more
openaire   +1 more source

Typhoon‐Driven Near‐Surface Groundwater Dynamics Revealed by Ambient Noise in the Mountain Watershed

Geophysical Research Letters, Volume 53, Issue 18, 28 September 2026.
Abstract Near‐surface groundwater dynamics (NSGD) regulate water residence time and downstream water resources in mountain watersheds, yet whether a single extreme rainfall event can reorganize near‐surface storage remains unclear. Here, we examine typhoon‐driven NSGD using ambient seismic noise from four stations, together with hydrological and ...
Cheng‐Hua Tsai, Luc Illien, Li‐Wei Chen, Ci‐Jian Yang   +3 more
wiley   +1 more source