Results 51 to 60 of about 603 (176)

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

Investigation of Hydraulic Pathways with Borehole Radar.

Journal of the Japan Society of Engineering Geology, 1992
Recently, structures of strata and permeability in the rock mass have been investigated with borehole radar systems using electromagnetic waves.As a result of examinations, the explorative distance of the system was limited from 100 meters in the fractuered granite rock mass under present conditons in Japan, and further improvements are needed to ...
KITAMURA, Takaomi, INABA, Hideo, KOJO, Hiromi, SHIOZAKI, Isao, TAKIZAWA, Kiwamu, TONOUCHI, Shoji   +5 more
openaire   +2 more sources

“Cold Tropics”: Permafrost Existence and Thickness on Eastern Nevado Coropuna (Southern Peruvian Andes) Revealed by Ground‐Penetrating Radar and Geoelectrical Soundings

Permafrost and Periglacial Processes, Volume 37, Issue 3, Page 517-534, July/September 2026.
ABSTRACT The existence of permafrost was explored at tropical latitude on Nevado Coropuna (southern Peruvian Andes) using a combination of ground‐penetrating radar (GPR) and vertical electrical sounding (VES) in order to strengthen the mutual validation of data processing and interpretation.
Velnia Chacca, Ramón Pellitero, Adriano Ribolini, José Úbeda, Luis Mariano del Río, Ricardo Vila, Oscar Vilca   +6 more
wiley   +1 more source

Ground-penetrating radar and electrical resistivity tomography for mapping bedrock topography and fracture zones: a case study in Viru-Nigula, NE Estonia [PDF]

Estonian Journal of Earth Sciences, 2017
The Geological Base Map (GBM), presenting an elongated buried valley running beneath the Varudi bog, triggered the geophysical studies near Viru-Nigula borough in northeastern Estonia.
Ivo Sibul, Jüri Plado, Argo Jõeleht
doaj   +1 more source

Reinterpreting the Recurrence Time–Moment Relation of Global Repeating Earthquakes: A Scattered Data Cloud Bounded by Crack‐Model Physics

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 7, July 2026.
Abstract Repeating earthquakes are recurrent ruptures of the same asperity along creeping faults, and their recurrence time–moment (Tr ${T}_{r}$–M0 ${M}_{0}$) scaling provides key constraints on earthquake physics and fault creep. However, previous studies have reported Tr∝M01/6 ${T}_{r}\,\propto \,{M}_{0}^{1/6}$, seemingly inconsistent with the ...
Binhao Wang, Baoning Wu, Yijian Zhou
wiley   +1 more source

Seismic Reflection Profiling at the Kentland Impact Structure, Indiana: Geophysical Characterization of Impact Induced Damage

Journal of Geophysical Research: Planets, Volume 131, Issue 7, July 2026.
Abstract The Kentland Impact Structure is a classic complex crater whose central peak is exposed in an active quarry in NW Indiana, USA. However, its diameter has remained poorly constrained due to the thick glacial sediment cover. Newly obtained seismic reflection profile images combined with refraction seismic tomography, earlier gravity surveying ...
Brian A. Robitaille, Douglas R. Schmitt, Christoph Büttner, Jonathan R. Delph, Stefan Buske   +4 more
wiley   +1 more source

The Geologic History of the Chehalis Forearc Basin, Washington State, USA

Tectonics, Volume 45, Issue 7, July 2026.
Abstract The Chehalis basin is located between the Cascade arc and the Coast Range in southwest Washington State. It consists of sedimentary and volcanic rocks deposited throughout the Cenozoic and is underlain by the Siletzia terrane, a thick, large igneous province accreted in the Eocene.
R. L. Moe, J. Bershaw, L. M. Staisch, A. R. Streig   +3 more
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

Geophysical identification of voids and loosened zones in the shallow subsurface of post-mining areas

E3S Web of Conferences, 2018
The shallow historic exploitation of Zn-Pb/Fe ore deposits as well as hard coal has generated many discontinuous deformations on the terrain surface in the Upper Silesian Coal Basin/Poland. Discontinuous deformations occur in different forms as sinkholes,
Pilecki Zenon
doaj   +1 more source

Stable Water Isotopes Improve Calibration and Flow Path Identification in Integrated Hydrological Models

Water Resources Research, Volume 62, Issue 7, July 2026.
Abstract Hydrological models often exhibit equifinality, where different parameter sets produce similar hydrometric outputs but alter internal catchment processes and partitioning. Incorporating new information amongst calibration targets helps narrow the range of viable models.
Omar Ashraf Nimr, Hannu Marttila, Anna Autio, Pertti Ala‐Aho   +3 more
wiley   +1 more source