Suitability of magnetometry to detect clandestine buried firearms from a controlled field site and numerical modeling

Magnetic survey using multiple magnetometers to obtain gradiometric data can be used as a non-destructive method to search for buried firearms. We present magnetic dataset collected above a set of weapons buried at 0.6 m, 1.2 m, and 1.8 m depths. We provide three datafiles: two datafiles were collected on a coarse grid (1 m by 0.5 m) before and after burial of the weapons, and a third one collected on a fine grid (0.25 m by 0.1 m) after the burial of the weapons which concentrates on the area of buried firearms. We used a Gem Systems GSM-19GW Overhauser gradiometer consisting of two sensors with a relative vertical separation of 55 cm. Data acquisition was done via non-automated point measurements within a gridded measurement domain with data collection locations managed using measurement tape. Each field campaign resulted in about 3,000 data points. In addition, we developed a set of MATLAB scripts to model the magnetic anomalies (total field and gradient) for buried firearms, this set is also included here. The data and modeling scripts relate to a research article published in Forensic Science International (Deng et al., Suitability of magnetometry to detect clandestine buried firearms from a controlled field site and numerical modeling [1] ). The dataset may be helpful for testing new algorithms for weapons detection while the numerical codes can be modified and applied for simulating magnetic anomalies resulting from similar buried objects with potential application in the sub-disciplines of forensic and archaeological geophysics.

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Gradient magnetometer dataset and MATLAB numerical code for simulating buried firearms at a controlled field site

Doro

Deng

Bank

2020

Data in Brief

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Geophysical approaches to the archaeological prospection of early modern battlefield landscapes: a review of methods and objectives

Williams,

Welham,

Eve

et al. 2024

Journal of Conflict Archaeology

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磁気特性を用いた砂質海岸での鉄製品の埋設物の検出―岡山県瀬戸内市矢寄ヶ浜の例―

Kawamura,

Hatakeyama,

Kitahara

2024

Jpn. J. Forensic Sci. Technol.

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In order to detect buried iron items in a natural sand beach, we conducted a magnetic survey with an Overhauser magnetometer. First, a three-meter-long survey line was laid at Yayorigahama Beach in Okayama Prefecture. A steel can, a stainless steel knife, and a plug-in multi-tap were buried at 10 cm. Magnetic field intensity (MFI) and the magnetic susceptibility (MS) were measured on the beach surface. The MS values indicate a relatively higher value at the site where the steel can was buried 10 cm in burial depths, while such an increase was found at the depths of 20 cm, 30 cm, 40 cm and 50 cm. The peak of MFI could be recognized at the depths of 10 cm to 40 cm. This implies that the MFI test with an Overhauser magnetometer is more effective than the MS measurement. Magnetic anomalies of MFI were recognized on another survey line in Yayorigahama Beach where reinforcing iron bars were found at a depth of 90 cm. Our results indicate that the hidden iron items could be detected using an Overhauser magnetometer in the sand beach.

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Suitability of magnetometry to detect clandestine buried firearms from a controlled field site and numerical modeling

Cited by 4 publications

References 42 publications

Gradient magnetometer dataset and MATLAB numerical code for simulating buried firearms at a controlled field site

Gradient magnetometer dataset and MATLAB numerical code for simulating buried firearms at a controlled field site

Geophysical approaches to the archaeological prospection of early modern battlefield landscapes: a review of methods and objectives

磁気特性を用いた砂質海岸での鉄製品の埋設物の検出―岡山県瀬戸内市矢寄ヶ浜の例―

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