Results 61 to 70 of about 1,817,388 (196)

Pore‐Scale Mechanism of Anomalous Saturation Dependence for Induced Polarization: Insights From Desiccation Experiments and Pore‐Network Modeling

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 9, September 2026.
Abstract The complex conductivity method, also known as spectral induced polarization (SIP), is widely used in hydrogeophysical investigations. Power‐law functions with positive exponents between the in‐phase/quadrature components of complex conductivity and water saturation are key petrophysical relationships to interpret field data.
Siyuan Qiang, Xiaoqing Shi, André Revil, Alexis Maineult   +3 more
wiley   +1 more source

The geoelectric field: a link between the troposphere and solar variability [PDF]

Annals of Glaciology, 1998
The association of the European “Little Ice Age” (1550- 1850; Lamb, 1982) with a period of significantly reduced solar activity (Eddy, 1976) suggests a significant mechanism of climate variation remains to be determined.
G. B. Burns, A.V. Frank-Kamenetsky, E. A. Bering, V. O. Papitashvili, O. A. Troshichev   +4 more
openaire   +1 more source

Why Does the Broken Hill Deposit Sit in Resistive Crust? Magnetotelluric Evidence for Metamorphic Decoupling of a World‐Class Mineral System

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 9, September 2026.
Abstract The spatial association between electrical conductors and ore deposits underpins the widespread use of magnetotellurics (MT) in mineral exploration, yet not all mineral systems preserve a diagnostic conductive signature. Here, we present a high‐resolution MT study of the region hosting the world‐class Broken Hill Pb‐Zn‐Ag deposit (NSW ...
Yahya AlQahtani, Sinan Özaydın, Vasileios Chatzaras, Patrice F. Rey, Tiago Passos   +4 more
wiley   +1 more source

The importance of non-uniform geoelectric fields in calculating GIC distributions

, 2013
During the ascending phase of solar cycle 24 concern in the power industry regarding space weather has increased significantly. This is driving the development of software tools to estimate GIC distributions in power networks for a given uniform ...
C. L. Waters, Marshall, R. A., Waters, C. L., Saha, T. K., Yumoto, K., Burstinghaus, E. J., E. J. Burstinghaus, T. K. Saha, K. Yumoto, R. A. Marshall   +9 more
core   +1 more source

Space Weather Mitigation Decisions by Critical Infrastructure Operators During Solar Cycle 25

Space Weather, Volume 24, Issue 9, September 2026.
Abstract The “Gannon Storm” in May 2024 was the largest space weather event experienced in 20 years, generating auroras at latitudes as low as 35°, visible in Florida and Mexico. Such events pose significant operational challenges for critical infrastructure operators, particularly those managing electricity transmission networks, satellite ...
C. M. LaNeve, E. J. Oughton, N. Rivera, R. S. Weigel, D. Thomas, C. T. Gaunt   +5 more
wiley   +1 more source

Extreme value statistics applied to geoelectric activity in Europe ... a first look [PDF]

, 2013
The Nagycenk observatory now has more than 50 years of geoelectric (or telluric) field data. In this poster we apply the technique of extreme value statistics to these data to determine the 1 in 100 and 1 in 200 year peak values of the surface electric
Thomson, Alan, Clarke, Ellen, Kelly, Gemma, Dawson, Ewan, Wesztergom, Victor, Nagy, Tamás, Baillie, Orsi   +6 more
core   +3 more sources

Multi‐Scale Intense Geoelectric and Geomagnetic Field Perturbations Observed After an Interplanetary Magnetic Field Turning

Space Weather
Intense geoelectric fields during geomagnetic storms generate geomagnetically induced currents in power grids and other infrastructure, necessitating an understanding of their causes, for example, through coordinated space and ground observations.
Xueling Shi, Michael D. Hartinger, Ying Zou, E. Joshua Rigler, James M. Weygand, Anna Kelbert, Greg M. Lucas, Joseph B. H. Baker, Vassilis Angelopoulos   +8 more
doaj   +1 more source

Systematic Component‐Level Characterization of Electricity Transmission Infrastructure for Space Weather Risk Assessment

Space Weather, Volume 24, Issue 9, September 2026.
Abstract Space weather risk assessment is constrained by the lack of available asset information needed to model geomagnetically induced currents (GICs) in electricity transmission infrastructure. We propose a systematic method that enables risk analysts to collect their own open‐source substation data.
Dennies K. Bor, Edward J. Oughton, Evan A. Peters, Noah Rivera, C. Trevor Gaunt, Robert S. Weigel, Michael Wiltberger   +6 more
wiley   +1 more source

Did Space Weather Delay the 10:05 p.m. Train Departure From Exeter on 18 October 1841?

Space Weather, Volume 24, Issue 9, September 2026.
Abstract Although the Carrington Event of 1859 is typically cited as the first extreme space weather event of the scientific era, it is not the earliest example of modern human technology being impacted by geomagnetic activity. The literature includes reliable accounts of disturbances to telegraph equipment during geomagnetic storms dating to the late ...
James A. Wild, Ciaran D. Beggan, David H. Boteler, William B. Cade III, Brett A. Carter, Michael Hapgood   +5 more
wiley   +1 more source

Developing a New Ground Electric Field Model for Geomagnetically Induced Currents in Britain Based on Long‐Period Magnetotelluric Data

Space Weather
Large variations in ground electric field in mid‐latitude countries like the UK during a geomagnetic storm drive so‐called geomagnetically induced current, a major geohazard to ground‐based technological infrastructure like electrical transformers at ...
J. Hübert, E. Eaton, C. D. Beggan, A. M. Montiel‐Álvarez, D. Kiyan, C. Hogg   +5 more
doaj   +1 more source