Results 51 to 60 of about 284 (138)

Magma and Volatile Pathways Beneath Sakurajima Volcano From Self‐Potential, Helium Isotopes, and Broadband Magnetotellurics

Geophysical Research Letters, Volume 53, Issue 8, 28 April 2026.
Abstract At frequently erupting volcanoes, magma and volatiles ascend through established pathways, but the complete picture of their branching and supply system remains unclear. We integrated self‐potential (SP), broadband magnetotelluric (MT), and helium isotope observations to image magma and volatile pathways beneath Sakurajima Volcano.
K. Aizawa, T. Koyama, H. Hase, M. Uyeshima, H. Sumino   +4 more
wiley   +1 more source

Geophysical Input to Improve the Conceptual Model of the Hydrogeological Framework of a Coastal Karstic Aquifer: Uley South Basin, South Australia

Geosciences, 2018
A lack of closely spaced datasets on layer elevations, aquifer parameters, identification of areas with high recharge potential, dominant conduit porosity zones, and well defined boundary conditions hampers the ability of groundwater models to produce a ...
Nara Somaratne, Glyn Ashman, Michelle Irvine, Simon Mann   +3 more
doaj   +1 more source

A Hydrogeophysical Survey Utilising the sTEM and sTEMprofiler Systems: Transient Electromagnetic Data and Resistivity Models

Geoscience Data Journal, Volume 13, Issue 2, April 2026.
We present a transient electromagnetic dataset from northwestern Denmark acquired with the novel sTEMprofiler system, mapping buried Quaternary valleys. The open dataset, including raw data and resistivity models, enables benchmarking of inversion methods and integration into geological and hydrological studies. ABSTRACT Transient electromagnetic (TEM)
Line M. Madsen, Angelos Almpanis, Frederikke Storm, Jesper B. Pedersen   +3 more
wiley   +1 more source

Subsurface Investigations of Cryo‐Hydrogeological Features in a High Arctic Catchment Under Transition

Permafrost and Periglacial Processes, Volume 37, Issue 2, Page 267-283, April/June 2026.
ABSTRACT In this study, the internal structure and seasonal variations of cryo‐hydrogeological features were investigated in the Fuglebekken catchment, located near the Polish Polar Station Hornsund in Svalbard. Over a few years, rising air temperatures and intensified water circulation have significantly altered the distribution, extent, and state of ...
Tomasz Wawrzyniak, Szymon Oryński, Artur Marciniak, Marzena Osuch   +3 more
wiley   +1 more source

Time‐Varying Gravity Constraints on Groundwater Recharge and Managed Aquifer Strategies in Southern Taiwan

Water Resources Research, Volume 62, Issue 4, April 2026.
Abstract Understanding groundwater recharge pathways is essential for designing effective managed aquifer strategies, yet in heterogeneous alluvial aquifers, these pathways are often uncertain and difficult to resolve with sparse well networks. We apply gravity as an independent constraint to quantify groundwater storage dynamics and evaluate recharge ...
Kuan‐Hung Chen, Cheinway Hwang, Ching‐Chung Cheng, Chia‐Kuei Kang, Miao‐Hsiang Peng, Jet‐Chau Wen, I‐Chen Kuo   +6 more
wiley   +1 more source

Compiling a national resistivity atlas of Denmark based on airborne and ground-based transient electromagnetic data

, 2016
We present a large-scale study of the petrophysical relationship of resistivities obtained from densely sampled ground-based and airborne transient electromagnetic surveys and lithological information from boreholes.
Møller, Ingelise, Christiansen, Anders V., Barfod, Adrian A.S.   +2 more
core   +1 more source

Investigating surface-borehole transient electromagnetic responses from veined orebodies considering induced polarization effects

Meitian dizhi yu kantan
ObjectiveThe observational data derived using the surface-borehole transient electromagnetic (TEM) method tend to feature complex curve morphologies, a problem posing significant challenges to data processing and interpretation.
Jianhui LI, Yao WANG, Wenchuang WANG, Shaojian XIE, Siwei ZHU   +4 more
doaj   +1 more source

The Evolving Roles of Electrical Geophysical Methods for In Situ Remediation Assessment: Progress and Perspectives

Water Resources Research, Volume 62, Issue 4, April 2026.
Abstract In situ remediation of contaminated soil and groundwater demands real‐time monitoring to capture complex subsurface dynamics. Geophysical methods, particularly electrical resistivity tomography (ERT) and induced polarization (IP), offer non‐ or minimally invasive, high‐resolution imaging of subsurface changes during remediation.
Teng Xia, Miao Li, Lee Slater, Xiangyun Hu, Andrew Binley, Xinmin Ma, Deqiang Mao   +6 more
wiley   +1 more source

A Comparison of Surface-to-Coal Mine Roadway TEM and Surface TEM Responses to Water-Enriched Bodies

IEEE Access, 2019
The surface transient electromagnetic method (TEM) is a geophysical technology normally used in detecting water-enriched zones. However, with an increase of mining depth, the accuracy and reliability of surface detection is gradually reduced, and surface
Jianghao Chang, Guoqiang Xue, Reza Malekian   +2 more
doaj   +1 more source

Stratigraphic evidence for modern‐like glacier extents in south‐central Alaska within the last glacial period (MIS 3)

Boreas, Volume 55, Issue 2, Page 476-502, April 2026.
The last (Wisconsinan) glacial period was punctuated in North America by two glacial maxima, known as the Early and Late Wisconsinan glaciations. In Alaska, these maxima and their subsequent retreats have been the object of dating efforts to reconstruct local climatic events and compare them to global trends.
Bruno Belotti, Elizabeth J. Cassel, Timothy C. Bartholomaus, Michael G. Loso, Michael S. Christoffersen, John W. Holt   +5 more
wiley   +1 more source