Relative importance of magnetic moments in UXO clearance applications
SEG Technical Program Expanded Abstracts
By: V. Sanchez, Y. Li, M. Nabighian, and D. Wright
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Abstract
Surface magnetic anomaly observed in UXO clearance is mainly dipolar and, as a result, the dipole is the only moment used regularly in UXO applications. The dipole moment contains intensity of magnetization information but lacks shape information. Unlike dipole, higher-order moments, such as quadrupole and octupole, encode asymmetry properties of magnetization distribution within buried targets. In order to improve our understanding of magnetization distribution within UXO and non-UXO objects and its potential utility in UXO clearance, we present results of a 3D numerical modeling study for highly susceptible metallic objects. The basis for modeling is the solution of a nonlinear integral equation, describing magnetization within isolated objects, allowing us to compute magnetic moments of the object, analyze their relationships, and provide a depiction of the surface anomaly produced by the different moments within the object. Our modeling results show significant high-order moments for more asymmetric objects situated at typical UXO burial depths, and suggest that the increased relative contribution to magnetic gradient data from these higher-order moments may provide a practical tool for improved UXO discrimination. ?? 2005 Society of Exploration Geophysicists.
Suggested Citation
Sanchez, V., Li, Y., Nabighian, M., and Wright, D., 2006, Relative importance of magnetic moments in UXO clearance applications: SEG Technical Program Expanded Abstracts, v. 25, no. 1, p. 1381-1385, https://doi.org/10.1190/1.2369777.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Relative importance of magnetic moments in UXO clearance applications |
| Series title | SEG Technical Program Expanded Abstracts |
| DOI | 10.1190/1.2369777 |
| Volume | 25 |
| Issue | 1 |
| Publication Date | October 06, 2006 |
| Year Published | 2006 |
| Language | English |
| Larger Work Type | Article |
| Larger Work Subtype | Journal Article |
| Larger Work Title | SEG Technical Program Expanded Abstracts |
| First page | 1381 |
| Last page | 1385 |