Electrokinetics effects, induced by the coupling between hydraulic and electric flow, are often involved in the interpretation of many observations in Earth Sciences.

Self-potential (SP) and seismo-electromagnetics observations are performed to detect fluid flow in the crust, contrast of rock properties (fluid, permeability, saturation state), fracture aperture and are used for hydrogeological, geothermal, and hydrocarbon prospecting. The SP observations have also important consequences for environmental and volcanic risk. Recent advances on techniques and theory are very promising. However the interpretation of the seismo-electromagnetic conversions and of the temporal variations of SP is still difficult.

Contributions on theory, field observations, laboratory measurements, and analogue models of SP temporal variations on the one hand, forward and inverse modeling of SP data on the other hand, are needed. Moreover the search of the key parameters on the electrokinetic sources, as electrical conductivity, formation factor, fluid geochemistry, partial saturation, CO2 flow rate, is still debating.

We therefore invite contributions on all these aspects of the electrokinetic coupling. Potential topics include, but are not limited to:

• Recent developments in seismo-electromagnetics conversions
• Observations and modeling of electrokinetics during fault rupture or hydraulic fracturing
• Observations on volcanoes
• Developments and testing forward and inverse modeling
• Developments in borehole investigations
• Laboratory investigations on steady-state and transient electrokinetic potentials

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