Results 41 to 50 of about 2,742 (208)

Geolectric field measurement, modelling and validation during geomagnetic storms in the UK

Journal of Space Weather and Space Climate, 2021
Significant geoelectric fields are produced by the interaction of rapidly varying magnetic fields with the conductive Earth, particularly during intense geomagnetic activity.
Beggan Ciarán D., Richardson Gemma S., Baillie Orsi, Hübert Juliane, Thomson Alan W. P.   +4 more
doaj   +1 more source

Meshless IEFGM‐Based Numerical Modeling of Grounding Systems With Counterpoise Wires

International Journal of Numerical Modelling: Electronic Networks, Devices and Fields, Volume 39, Issue 1, January/February 2026.
ABSTRACT This paper presents a comprehensive numerical analysis of a counterpoise grounding wire subjected to low‐frequency surge currents, employing the Interpolating Element‐Free Galerkin Method (IEFGM). The analysis involves significant challenges arising from the high ratio between the conductor length and its radius—which demands fine spatial ...
Ursula C. Resende, Jean L. M. Vieira, Victor G. L. C. Amorim   +2 more
wiley   +1 more source

Evidence of Subduction, Collision, and Extension in Northern Borneo: Constraints From Receiver Functions

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 1, January 2026.
Abstract What happens when subduction stops is a key, but poorly understood, part of the tectonic cycle. Northern Borneo (Sabah) with a complex geological history of multiple episodes of subduction, magmatism, uplift, subsidence, and extension since the Mesozoic, is an ideal location for studying post‐subduction processes.
Amy Gilligan, David G. Cornwell, Nicholas Rawlinson, Felix Tongkul, Simone Pilia, Tim Greenfield, Conor A. Bacon   +6 more
wiley   +1 more source

Deformation Controlled Fluid Mass‐Transfer Processes in Ancient Orogens

Geophysical Research Letters
Despite abundant empirical evidence, the details of coupled deformation and mass transfer processes within a framework of the crustal architecture of ancient orogens remains enigmatic.
G. J. Hill, B. M. Frieman, E. A. Roots, P. E. Wannamaker, V. Maris, R. Haugaard, J. Kamm, R. Klanica, S. Kovacikova, A. J. Calvert, J. A. Craven, R. S. Smith   +11 more
doaj   +1 more source

Research on the three-dimensional electrical structure of the shallow portion of the southern segment of the Red River Fault (Dazhai Village)

Earth and Planetary Physics
No earthquake of magnitude six or greater has been recorded historically in the southern segment of the Red River Fault (RRF). This absence constitutes a significant seismic gap, suggesting a risk of future strong earthquakes.
Jiong Zhang, Yan Jing, XiaoBin Chen, JunTao Cai, ZhongYin Liu, XingXing Huang, PeiJie Wang   +6 more
doaj   +1 more source

Regional Three‐Dimensional Magnetotelluric Electrical Resistivity Model of the Manica Greenstone Belt, Western Mozambique

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 1, January 2026.
Abstract Magnetotelluric (MT) survey results from the Late Archean Manica greenstone belt, an extension of the Odzi‐Mutare greenstone belt of the Zimbabwe Craton, are presented. A total of 33 MT stations were acquired on an irregular grid with an average station spacing of approximately 5 km.
Joao Jr. J. Castelo, Thorkild M. Rasmussen, Maxim Smirnov, Salvador Mondlane Jr., Daud Liace Jamal   +4 more
wiley   +1 more source

Geophysical Evidence of the Collisional Suture Zone in the Prydz Bay, East Antarctica

Geophysical Research Letters
The location and origin of Neoproterozoic‐Cambrian sutures provide keys to understand the formation and evolution of the supercontinent Gondwana. The Larsemann Hills is located near a major Neoproterozoic‐Cambrian suture zone in the Prydz Belt, but has ...
Lei Fu, Jingxue Guo, Weisen Shen, Xin Wang, Xiaochun Liu, Xiaofei Chen, Xiangyun Hu   +6 more
doaj   +1 more source

Magnetotelluric regional strike [PDF]

GEOPHYSICS, 1982
A new method for determining regional strikes from the magnetotelluric impedance tensor Z and tipper T is presented. It involves the minimization of weighted sums of the squared magnitudes of elements of Z or T over all frequencies and all stations of interest.
T. D. Gamble, W. M. Goubau, R. Miracky, J. Clarke   +3 more
openaire   +1 more source

The Magmatic‐Hydrothermal System of the Three Sisters Volcanic Cluster, Oregon, Imaged From Field Gravity Measurements

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 1, January 2026.
Abstract From 2019 to 2024, gravity surveys were conducted at the Three Sisters volcanic cluster (TSVC), measuring 246 gravity sites using a spring relative gravimeter. We calculated the residual Bouguer anomaly and identified three main zones with negative anomalies, ranging from −4 to −8 mGal, located southwest and west of South Sister, within an ...
Hélène Le Mével, Nathan L. Andersen, Annika E. Dechert, Josef Dufek   +3 more
wiley   +1 more source

Groundwater Circulation Within the Mountain Block: Combining Flow and Transport Models With Magnetotelluric Observations to Untangle Its Nested Nature

Water Resources Research
Mountains are vital water sources for humans and ecosystems, continuously replenishing lowland aquifers through surface runoff and mountain recharge.
D. Gonzalez‐Duque, J. D. Gomez‐Velez, M. A. Person, S. Kelley, K. Key, D. Lucero   +5 more
doaj   +1 more source