Multi-component marine electromagnetic signal acquisition method

A method for determining a component of electric field response of the Earth's subsurface to a time-varying electromagnetic field induced in the Earth's subsurface, comprising:

• measuring electric field response along at least two laterally-opposed sensor cables on at least one of the Earth's surface and the bottom of a body of water;
• measuring at least one electric field between the at least two laterally-opposed sensor cables on at least one of the Earth's surface and the bottom of the body of water;
• measuring magnetic field response in three directions along the at least two laterally-opposed sensor cables on at least one of the Earth's surface and the bottom of the body of water;
• and
• determining an electric field response in a direction normal to the measured electric field response using the electric field response and magnetic field response measurements and the at least one electric field measurement.