On identifying magnetized anomalies using geomagnetic monitoring

TL;DR

This paper develops a mathematical framework for detecting and characterizing underground magnetized anomalies through changes in Earth's magnetic field, enhancing geomagnetic monitoring techniques.

Contribution

It introduces a rigorous mathematical approach to uniquely identify the locations and properties of magnetized anomalies beneath the Earth using geomagnetic data.

Findings

Unique recovery of anomaly locations and parameters

Mathematical validation of geomagnetic detection methods

Theoretical foundation for practical geomagnetic monitoring

Abstract

We propose and investigate the inverse problem of identifying magnetized anomalies beneath the Earth using the geomagnetic monitoring. Suppose a collection of magnetized anomalies presented in the shell of the Earth. The presence of the anomalies interrupts the magnetic field of the Earth, monitored above the Earth. Using the difference of the magnetic fields before and after the presence of the magnetized anomalies, we show that one can uniquely recover the locations as well as their material parameters of the anomalies. Our study provides a rigorous mathematical theory to the geomagnetic detection technology that has been used in practice.