Estimating The Location of a Buried Body from Magnetic Anomaly Through Normalized Full Gradient: A Case Study from The Sapinuwa Ancient City, Turkey

Abstract

In geophysics, magnetic data can be used to obtain information about the depth and location of the structure, whether it is near the surface or deeper. This study is an example of applying the Normalized Full Gradient (NFG) method to an archeological site to determine the depth and location of structures that cause magnetic anomalies at the archeological site. One of the parameters that affects the shape and size of the magnetic anomaly is the depth of the source causing the anomaly. For this reason, it is important to correctly determine the location of the source. One of the methods of determining the depth of the structure using magnetic field data is the NFG technique. When using the downward analytical continuation, bias occurs due to the transition of the depth of mass, which is invalidated by this method. The NFG technique has been tested on anomalies caused by prismatic synthetic models. Test studies with synthetic models using the NFG technique have yielded satisfactory results. Based on these results, the NFG technique was applied to the real magnetic anomaly collected from the ancient city of Sapinuwa. The results were compared with the building remains found during the proposed excavations. The results obtained were satisfactory..