Unstable spatial differences of the geomagnetic elements caused by changing water saturation of a volcanic sediment

Article Sidebar

PDF
Published: Apr 15, 2019
DOI: https://doi.org/10.4401/ag-7351
Keywords:
Effect on main geomagnetic field, Rock magnetism, Magnetic anomalies, Volcanic sediments, Observatory practice, Water saturation

Main Article Content

András Csontos
Geological and Geophysical Institute of Hungary
Peter Kónya
György Falus
Anikó Besnyi

Abstract

Since the beginning of geomagnetic recording at Tihany Geophysical Observatory, baseline instability has been observed, especially in the case of the old variation house. The regularly observed annual baseline change is independent from the type of magnetometer. Common environmental effects on the instruments (for example temperature effects) are not suitable to characterize this variation. A possible reason of this instability is an unconventional geomagnetic effect on the magnetic properties of the sediment. The water saturation of a lake mud in a geyser cone shows correspondence with the variation of the base values. X-ray powder diffraction measurement detected goethite in the lake mud which, in fact makes possible the appearance of a super-ferromagnetic effect on goethite. In this study we present a possible source and the mechanism of the effect.

Article Details

How to Cite
Csontos, A., Kónya, P., Falus, G. and Besnyi, A. (2019) “Unstable spatial differences of the geomagnetic elements caused by changing water saturation of a volcanic sediment”, Annals of Geophysics, 61(6), p. GM669. doi: 10.4401/ag-7351.
Issue
Vol. 61 No. 6 (2018)
Section
Geomagnetism and Paleomagnetism

Open-Access License

No Permission Required

Istituto Nazionale di Geofisica e Vulcanologia applies the Creative Commons Attribution License (CCAL) to all works we publish.

Creative Commons License

Under the CCAL, authors retain ownership of the copyright for their article, but authors allow anyone to download, reuse, reprint, modify, distribute, so long as the original authors and source are cited. No permission is required from the authors or the publishers.

In most cases, appropriate attribution can be provided by simply citing the original article.
If the item you plan to reuse is not part of a published article (e.g., a featured issue image), then please indicate the originator of the work, and the volume, issue, and date of the journal in which the item appeared. For any reuse or redistribution of a work, you must also make clear the license terms under which the work was published.
This broad license was developed to facilitate open access to, and free use of, original works of all types. Applying this standard license to your own work will ensure your right to make your work freely and openly available. For queries about the license, please contact ann.geophys@ingv.it.