Results 61 to 70 of about 1,538 (216)

The United States Magnetotelluric Array and the National Impedance Map

Reviews of Geophysics, Volume 64, Issue 2, June 2026.
Abstract The United States Magnetotelluric Array (USMTArray) data set, collected in the years 2006–2024, consists of more than 1,700 long‐period magnetotelluric stations covering the entirety of the contiguous United States on a quasi‐regular 70 km grid.
Anna Kelbert, Paul A. Bedrosian, Adam Schultz, Gary D. Egbert, Louise Pellerin, Jeffrey J. Love, Andrew Frassetto, Benjamin S. Murphy   +7 more
wiley   +1 more source

How Close are the Edges of a Closed Fracture? [PDF]

, 2008
A laboratory experiment is peresented where the theory of amplitude reflection tuning in thin beds is tested.
Calzoni, Corrado, Sambuelli., L., SAMBUELLI, Luigi   +2 more
core  

A plot-scale study of firn stratigraphy at Lomonosovfonna, Svalbard, using ice cores, borehole video and GPR surveys in 2012–14

Journal of Glaciology, 2017
Spatial heterogeneity of snow and firn properties on glaciers introduces uncertainty in interpretation of point and profile observations and complicates modelling of meltwater percolation and runoff.
SERGEY MARCHENKO, VEIJO A. POHJOLA, RICKARD PETTERSSON, WARD J. J. VAN PELT, CARMEN P. VEGA, HORST MACHGUTH, CARL E. BØGGILD, ELISABETH ISAKSSON   +7 more
doaj   +1 more source

Determining the Character of Subglacial Sediments in the Ice‐Bedrock Interface Zone of Antarctica Using Horizontal‐to‐Vertical Spectral Ratios (HVSRs) of Seismic Ambient Noise

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 6, June 2026.
Abstract Interactions between the Antarctic Ice Sheet and the underlying solid Earth occur within the ice‐bedrock interface zone (IBIZ), containing structures of sediments and rocks that strongly influence ice sheet dynamics. Existing insights into the Antarctic IBIZ come primarily from interpretations of airborne geophysical data and active seismic ...
I. D. Kelly, A. M. Reading, T. Stål, B. Kulessa, A. García‐Jerez, J. Piña‐Flores, E. Paolucci, A. Tanzini, R. J. Turner, J. C. Magyar, A. P. Bassom   +10 more
wiley   +1 more source

The financial benefit of using borehole radar to delineate mining blocks in underground platinum mines [PDF]

, 2009
Dissertation (MSc)--University of Pretoria, 2009.Borehole radar is a short-range, high-resolution geophysical technique that can be used to delineate the position of the Merensky platinum reef in underground mines situated in the Western Bushveld Complex.

core  

Elements of a continuous-wave borehole radar. Final report

, 1997
The theory is developed for the antenna array for a proposed continuous-wave, ground-penetrating radar for use in a borehole, and field measurements are presented.
Caffey, T.W.H.
core   +1 more source

Rock Physics of the Critical Zone: Models, Inversion, and Interpretation

Reviews of Geophysics, Volume 64, Issue 2, June 2026.
Abstract Rock physics models link geophysical measurements with subsurface petrophysical properties, such as porosity, mineral composition, and fluid saturation. While originally developed for hydrocarbon exploration, these models are increasingly applied in the near surface for quantitative interpretation of geophysical data.
Dario Grana, Brady A. Flinchum, Denys Grombacher, Andrew D. Parsekian, Clifford S. Riebe, W. Steven Holbrook   +5 more
wiley   +1 more source

Measuring vertical soil water content profiles by combining horizontal borehole and dispersive surface ground penetrating radar data

, 2020
To investigate transient dynamics of soil water redistribution during infiltration, we conducted horizontal borehole and surface ground penetrating radar measurements during a 4‐day infiltration experiment at the rhizontron facility in Selhausen, Germany.
van der Kruk, Jan, Johan Alexander Huisman, Yu, Yi, Jan Vanderborght, Huisman, Johan Alexander, Jan van der Kruk, Vereecken, Harry, Lutz Weihermüller, Weihermueller, Lutz, Harry Vereecken, Klotzsche, Anja, Weihermüller, Lutz, Yi Yu, Anja Klotzsche, Vanderborght, Jan   +14 more
core   +1 more source

Land Subsidence Susceptibility Mapping in Semi‐Arid Regions Using PS‐InSAR and Tree‐Based Ensemble Machine Learning: A Case Study From Çumra, Türkiye

Transactions in GIS, Volume 30, Issue 4, June 2026.
ABSTRACT Land subsidence is an increasing environmental hazard in semi‐arid agricultural basins where intensive groundwater abstraction, compressible geological units, and expanding land‐use pressures interact. This study presents a PS‐InSAR and machine‐learning‐based framework for land subsidence susceptibility mapping in the Çumra District of the ...
Burhan Baha Bilgilioğlu
wiley   +1 more source

Development and performance test of UWB radar life detector for mine borehole rescue

Meikuang Anquan
In response to the problem of blocked escape routes and difficulty in determining the location of trapped personnel caused by mining disasters and accidents, based on the principles and characteristics of ultra wideband (UWB) radar life information ...
Xi CHEN, Hu WEN, Yuan HUANG
doaj   +1 more source