“Make the ground transparent”. Such is the aim of applied geophysics, which proposes to characterize the geometry of the subsoil. Since our eyes, which are able to gaze at distant stars, are unable to see through the surface of the floor, we can use electromagnetic fields to easily penetrate the Earth’s surface and observe what lies beneath.
This book describes the magnetic and electromagnetic induction prospecting methods used by applied geophysicists in exploring the world under our feet. The magnetic method is passive: it measures the tiny variations in the magnetic field just above the surface. On the contrary, electromagnetic induction using a Slingram is an active method in which electric currents are magnetically induced and measured in the subsoil without direct contact.
These methods extend our senses, making it possible to draw up geophysical maps that reveal buried structures previously invisible to our eyes.
Everyday Applied Geophysics 2: Magnetics and Electromagnetism is designed in such a way that the well-informed non-expert may use the information within, including the electronic diagrams, to build their own magnetometer or Slingram to practice applied geophysics and carry out their own analyses.
1. Magnetic Methods.
2. The Electromagnetic Induction or “Slingram” Method.
3. Processing Geophysical Maps.
Nicolas Florsch is a Geophysicist Engineer and Professor at Sorbonne University in Paris, France, where he teaches Applied and Environmental Geophysics.
Frédéric Muhlach is Director of the Val d’Argent Labs in Haut-Rhin, France. His passion lies in new technologies and digital creations.
Michel Kammenthaler is Professor of Technology at J.G. Reber College in Sainte-Marie-aux-Mines in Haut-Rhin, France.
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