This session solicits contributions on EM data processing, source field analysis, instrumentation, and field practice. We welcome contributions on all aspects of data processing, including theory and practical applications. Development and application of time lapse observations (monitoring) of transfer functions and other parameters as well as new approaches to estimation of transfer functions and their uncertainty can be presented here. We also solicit studies on source fields, whether controlled or uncontrolled. This includes characterization of external source spatial structure and temporal variability, novel (distributed) transmitter configurations, and effects of finite spatial-scale sources (natural and anthropogenic) on transfer functions. Contributions on new instrumentation and field practice and related methodological developments are also appropriate for this session. Studies of sensor fidelity either by noise level analysis or by field comparison with other sensors are appropriate. Sensors can include ohmic or capacitively coupled electrodes, magnetometers, and any other instruments whose inter-comparison with EM data demonstrates new insights.
The geo-electromagnetic phenomena are fundamentally governed by Maxwell's equations. This session covers all aspects of theory, modelling and inversion in which Maxwell's equations are applied to study the electric properties of the Earth. We invite contributions on advances in electromagnetic (EM) theory, analytic and numerical solutions, physical modelling, imaging and inversion algorithms, software implementations, as well as case studies related to the above topics. We further welcome methodological contributions, which solve integrated geoscientific problems or provide new insights into multi-disciplinary data integration, complex Earth medium modelling, 3D/4D inversion algorithms. Initiatives such as open source software, that benefit the community at large, and works that make good use of emerging technologies, like data mining, machine learning and cloud computing, are also warmly invited.
EM methods are widely used for obtaining different properties of the Earth’ subsurface (electrical resistivity, magnetic permeability, dielectric constant, or IP parameters) ranging from the shallow near surface down to the upper mantle. Different techniques, field configurations and their combinations are applied for different tasks in exploration, monitoring and hazard assessment. We are pleased to invite researchers to submit abstracts of their works related to recent developments and case studies that highlight the role of EM induction in exploration of minerals, oil and gas, groundwater and geothermal resources, environmental and engineering problems, and natural hazards assessment. We appreciate contributions on different aspects of EM methods and their application. We warmly solicit contributions that emphasize and evaluate the role of EM methods to natural resources exploitation, hazard assessment through EM monitoring both in seismic and volcanic environments as well as in geomagnetically induced currents. Finally, we also encourage contributions addressing the data processing and interpretation of EM exploration techniques aimed at lithological characterization as well as at determination of petrophysical and hydrophysical properties of rocks.
Electromagnetic (EM) methods provide information on the Earth’s electrical conductivity, which is sensitive to the presence of saline fluids, melts, temperature and conductive minerals. Fluid processes play a key role at subduction margins and in continental collision zones. Electrical resistivity models make it possible to infer temperature variations and to image shallow and deep magmatic processes, phase transitions and mineralization. Therefore, EM methods play an important role in geophysical studies of major geodynamic processes in the Earth. We invite a wide range of regional and global studies in different tectonic settings, including active continent collision zones, subduction zones, stable tectonic settings and volcanic areas. We encourage submission of multiparameter geophysical-petrological studies, in which electrical conductivity models are used alongside other geophysical methods to provide new insights into tectonics, magmatism and geodynamics.
Marine EM has wide applications studying the sub-seafloor conductivity structure to investigate fundamental processes as well as resource potential. We invite authors who work on passive and active electromagnetic methods in a marine or amphibious setting. The goal of this session is to promote an open discussions on ideas imbedded in forward modelling studies, on instrument development advances, on progress on data analysis and inversion techniques, and on multidisciplinary interpretation approaches.
The link between electrical resistivity from the laboratory/outcrop scale to lithosphericasthenospheric scale is challenging due to several factors (sampling procedure, local heterogeneity, anisotropy on multiple scales, geological structure, coupling between rocks and fluids, etc.). Despite major experimental, theoretical and modelling advances a remaining future goal is the development of meaningful experiments and models that allow us to identify and quantify the relationship between causative processes and electrical rock resistivity on different scales and in different environments (P,T, fluids). This is a critical step in order to unravel the complex evolution and dynamics of the earth's lithosphere-asthenosphere and also to develop predictive capabilities for energy applications. In this session, we therefore welcome studies that adopt novel approaches and combined methodologies using experimental and numerical methods in the laboratory and the field related to rock and mineral resistivity, as well as developments in the study of electrical anisotropy.
We solicit new contributions on induced electromagnetic fields at a planetary scale. We invite presentation of studies that shed light on the progress in our understanding of global electrical conductivity structures in the Earth´s mantle. Development of new methods of global forward and inverse modelling, use of new transfer functions, joint inversion for ionospheric sources and mantle conductivity, and interpretation of satellite magnetic field data are welcome. New methods that incorporate space physics constraints on the sources of electromagnetic induction at periods relevant to the Earth's mantle conductivity structures are particularly welcome. We also call for studies dedicated to magnetism and induction on other planets.
In addition to the advancement and application of electromagnetic induction science, members of IAGA Division VI play critical roles in education and outreach. In terms of education, this work may involve teaching undergraduate or graduate students, supervision of undergraduate or graduate research, or training new scientists how to use electromagnetic equipment. In terms of outreach, it may involve promoting large-scale electromagnetic projects to senior officials or other scientists, writing statements on the socioeconomic importance of electromagnetic induction studies, or providing entertaining visits to high school students. This session, the second of its kind at our electromagnetic workshops, is intended to collect posters highlighting novel, interesting, and/or important experiences from the teaching and outreach of electromagnetic induction. The sharing of ideas and information in these areas will help contribute to the overall public understanding of electromagnetic induction studies.