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Adler, P.M., Le Mouel, J. and Zlotnicki, J. (1999). Electrokinetic and magnetic fields generated by flow through a fractured zone: A Sensitivity study for La Fournaise Volcano. Geophysical Research Letters 26: doi: 10.1029/1999GL900095. issn: 0094-8276. |
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A number of electric and magnetic signals have been observed on La Fournaise volcano, attributed to electrokinetic effects. A simple model is proposed here to check this hypothesis. The volcano is idealized as a 2d heterogeneous structure composed of a fractured zone located between two porous zones through which meteoritic waters flow downwards; flow occurs predominantly in the fractured zone and induces electromagnetic fields. Correct orders of magnitude are obtained for the measured surface fields. The importance of the heterogeneous character of the underground medium is demonstrated; local measurements of various quantities are recommended. ¿ 1999 American Geophysical Union A number of electric and magnetic signals have been observed on La Fournaise volcano, attributed to electrokinetic effects. A simple model is proposed here to check this hypothesis. The volcano is idealized as a 2d heterogeneous structure composed of a fractured zone located between two porous zones through which meteoritic waters flow downwards; flow occurs predominantly in the fractured zone and induces electromagnetic fields. Correct orders of magnitude are obtained for the measured surface fields. The importance of the heterogeneous character of the underground medium is demonstrated; local measurements of various quantities are recommended. ¿ 1999 American Geophysical Union |
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Abstract |
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Table 1 |
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Keywords
Geomagnetism and Paleomagnetism, Spatial variations (all harmonics and anomalies), Mathematical Geophysics, Modeling, Physical Properties of Rocks, Magnetic and electrical properties, Volcanology |
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Publisher
American Geophysical Union
2000 Florida Avenue N.W.
Washington, D.C. 20009-1277
USA
1-202-462-6900
1-202-328-0566
service@agu.org |
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