Articles | Volume 8, issue 2
https://doi.org/10.5194/gi-8-217-2019
https://doi.org/10.5194/gi-8-217-2019
Research article
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22 Aug 2019
Research article | Highlight paper |  | 22 Aug 2019

A low-cost device for measuring local magnetic anomalies in volcanic terrain

Bertwin M. de Groot and Lennart V. de Groot

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Cited articles

Baag, C., Helsley, C. E., Xu, S., and Lienert, B. R.: Deflection of paleomagnetic directions due to magnetization of the underlying terrain, J. Geophys. Res.-Sol. Ea., 100, 10013–10027, 1995. a
Biggin, A. J., Perrin, M., and Dekkers, M. J.: A reliable absolute palaeointensity determination obtained from a non-ideal recorder, Earth Planet. Sc. Lett., 257, 545–563, 2007. a
Castro, J. and Brown, L.: Shallow paleomagnetic directions from historic lava flows, Hawaii, Geophys. Res. Lett., 14, 1203–1206, 1987. a
Coe, R. S., Jarboe, N. A., Le Goff, M., and Petersen, N.: Demise of the rapid-field-change hypothesis at Steens Mountain: The crucial role of continuous thermal demagnetization, Earth Planet. Sc. Lett., 400, 302–312, 2014. a
de Groot, L. V., Biggin, A. J., Dekkers, M. J., Langereis, C. G., and Herrero-Bervera, E.: Rapid regional perturbations to the recent global geomagnetic decay revealed by a new Hawaiian record, Nat. Commun., 4, 2727, https://doi.org/10.1038/ncomms3727, 2013a. a
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Short summary
Our knowledge of the Earth's magnetic field arises from magnetic signals stored in lavas. In rugged volcanic terrain, however, the magnetization of the underlying flows may influence the magnetic field as recorded by newly formed flows on top. To measure these local magnetic anomalies, we developed a low-cost field magnetometer with superior accuracy and user-friendliness. The first measurements on Mt. Etna show local magnetic variations that are much larger than expected.
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