Group of Geomagnetism

University of Neuchâtel

Southern part of the Swiss declination map (rel. to map North, epoch 1994.0)

Who? The staff:


Groupe de Géomagnétisme
Université de Neuchâtel
Rue Emile Argand 11
CH 2009 Neuchâtel
Phone: +41 32 718 26 00
Fax: +41 32 718 26 01

What and where? Main topics:

Magnetotelluric (MT) and GDS soundings:

Controlled-source audio-magnetotelluric (CSAMT):

Geomagnetic survey:

AMOS (automatic magnetic observatory station):


Field fluorometers for tracer tests in hydrogeology.


Schnegg, P.-A., 1998. A scheme for 3D MT modelling using polynomials. Protokoll über das 17. Kolloquium "Elektromagnetische Tiefenforschung", Neustadt an der Weinstrasse, 9-13.3.1998.

Gurk, M., 1998. Elektrisch leitfähige Strukturen in den Penninischen und Helvetischen Alpen Graubündens (Ostschweiz). Protokoll über das 17. Kolloquium "Elektromagnetische Tiefenforschung", Neustadt an der Weinstrasse, 9-13.3.1998.

Schnegg, P.-A., 1998. The magnetotelluric survey of the penninic Alps of Valais, in Matériaux pour la Géologie de la Suisse. Géophysique No 32, ISSN 0253-1186.

Schnegg, P.-A. and Kennedy K., 1998. A new borehole fluorometer for double tracer tests, in Mass Transports in Fractured Aquifers and Aquitards, Geoscience Center, Copenhagen.

Schnegg, P.-A., 1999. A procedure for modelling spatiotemporal variations of the geomagnetic field - Example of the 1998 model for Switzerland. Revista Geofisica, 48, 133-140, ISSN-0252-9769.

Gurk, M., 1999. Magnetic Distortion of GDS Transfer Functions: An Example from the Penninic Alps of Eastern Switzerland Revealing a Crustal Conductor. Earth Planets Space, 51, pp. 1023-1034.

Schnegg, P.-A., 1999. A Computing Method for 3D Magnetotelluric Modelling Directed by Polynomials. Earth Planets Space, 51, pp. 1005-1012.

Bosch, F., Gurk, M., 2000. Comparison of RF-EM, RMT and SP measurements on a karstic terrain in the Jura mountains (Switzerland). Protokoll über das 18. Kolloquium "Elektromagnetische Tiefenforschung", Altenberg, 20-24.3.2000.

Gurk, M., 2000. On the distribution of the electrical conductivity in the Central Alps, in Matériaux pour la Géologie de la Suisse. Géophysique No 35, ISSN 0253-1186 

Schnegg, P.-A. and Bossy, F., 2001. Sonde for Downhole Measurement of Water Turbidity and Dye Tracer Concentration, in: New Approaches Characterizing Groundwater Flow, Seiler & Wohnlich (eds), 2001 Swets & Zeitlinger Lisse, ISBN 902651 848 X

Kennedy, K., Müller, I., Schnegg, P.-A., Rossi, P., Kozel, R., 2001.Characterization of the Kappelen Groundwater Research Site (BE), Switzerland, and Preliminary Bacteriophage and Solute Tracer Component Responses. Beiträge zur Hydrogeologie, pp. 158-180.

Kennedy, K., Niehren, S., Rossi, P., Schnegg, P.-A., Müller, I., Kinzelbach, W., 2001. Results of Bacteriophage, Microsphere and Solute Tracer Migration Comparison at Wilerwald Test Field, Switzerland. Beiträge zur Hydrogeologie, pp. 180-210.

Gurk, M. and Schnegg, P.-A., 2001. Anomalous directional behaviour of the real parts of the induction arrows in the Eastern Alps: tectonic and paleogeographic implications. Ann. Geofisica Vol. 44, N. 4, 659-669.

Losito, G., Schnegg, P.-A., Lambelet, C., Viti, C., Trova, A., 2001. Microscopic scale conductivity as explanation of MT results from the Alps of Western Switzerland. Geophys. J. Int., 147, 602-609.

Gurk, M., Bosch, F., Challandes, N., Bigalke, J., 2001. Integration of geophysical methods to study the fold geometry of the Tschera nappe, eastern Switzerland. Eclogae geol. Helv. 94, 329-338.

Gurk, M., Bosch, F. 2001. Cave detection using the Self-Potential-Surface (SPS) technique on a karstic terrain in the Jura mountains (Switzerland). Protokoll über das 19. Kolloquium "Elektromagnetische Tiefenforschung", Burg Ludwigstein, 1-5.10.2001.

Schnegg, P.-A., 2002. An inexpensive field fluorometer for hydrogeological tracer tests with three tracers and turbidity measurement. XXXII IAH & ALHSUD Congress Groundwater and Human Development. Balkema, Mar del Plata, Argentina, pp. 1484-1488.

Schnegg, P.-A. and Fontes, S.L., 2002. Feasibility study of the geoelectric structure of the Araguainha impact, Brazil. Earth Planets Space, 54, pp. 597-606.

Schnegg, P.-A. and Flynn, R., 2002. Online field fluorometers for hydrogeological tracer tests. In: Isotope und Tracer in der Wasserforschung, Technische Universität Bergakademie Freiberg, Wissenschaftliche Mitteilungen, Institut für Geologie, 19, pp 29-36.

Pous, J., Heise, W., Schnegg, P.-A., Muñoz, G., Martí, J., Soriano, C., 2002. Magnetotelluric study of the Las Cañadas caldera (Tenerife, Canary Islands): Structural and hydrogeological implications, Earth Planet. Sci. Lett. 204, 249-263.

Schnegg, P.-A., 2003. A new field fluorometer for multi-tracer tests and turbidity measurement applied to hydrogeological problems. Proc. 8th International Congress of the Brazilian Geophysical Society, Rio de Janeiro, Brazil.

Schnegg, P.-A., Costa, R., 2003. Tracer tests made easier with field fluorometers. Technical note. Bull. Hydrogeol. 20, 2 pp.

Mekkawi, M., Grasso, J.-R., Schnegg, P.-A., 2004. A long-lasting relaxation of seismicity at Aswan reservoir, Egypt, 1982-2001. Bull. Seism. Soc. Am. 94, 479-492.

Mekkawi, M., Schnegg, P.-A., 2004. Les barrages à l'origine de tremblements de terre. Revue Tracés, 19, 7-11.

Valley, B., Burkhard, M. and Schnegg, P.-A., 2004. Dépliage 3-D des anticlinaux bordant le synclinal fermé de la vallée des Ponts, Jura central, Suisse. Eclogae geol. Helv., 97: 279-291.

Adepelumi, A.A., Flexor, J.M., Fontes, S.L. and Schnegg, P.-A., 2004. An integrated magnetotelluric and aeromagnetic investigation of the Serra da Cangalha impact crater, Brazil. Phys. Earth Planet. Inter., 150/1-3: 159-181.

Flynn, R., Schnegg, P.-A., Costa, R., Mallen, G., Zwahlen, F., 2005. Identification of zones of preferential groundwater tracer transport using a mobile downhole fluorometer. Hydrogeology J. 13, 366-377.

Mekkawi, M., Schnegg, P.-A., Arafa-Hamed, T., Elathy, E., 2005. Electrical structure of the tectonically active Kalabsha Fault, Aswan, Egypt. Earth Planet. Sci. Lett. 240, 764-773.

Schnegg, P.-A., Le Doucen, O., 2006. Multispectral field fluorometer for tracer tests in waters of high natural fluorescence. In: Durán, J.J., Andreo, B. y Carrasco, F. (Eds.). Karst, climate change and groundwater. Hidrogeologia y Aguas Subterráneas N°18. 77-80. Madrid.

Meus, Ph., Käss, W., Schnegg, P.-A., 2006. Background and detection of fluorescent tracers in karst groundwater. In: Durán, J.J., Andreo, B. y Carrasco, F. (Eds.). Karst, climate change and groundwater. Hidrogeologia y Aguas Subterráneas N°18. 65-75. Madrid.

Coppo, N., Schnegg, P.-A., Défago, M., GSCB, 2006. Mapping a shallow large cave using a high-resolution Very Low Frequency Electromagnetic method. In: Goldscheider, N., Mudry, J., Savoy, L., Zwahlen, F. (Eds.). Proc. 8th Conference on limestone hydrogeology, Neuchâtel, September 21-23, 2006, pp 71-74.

Gottsmann, J., Carniel, R., Coppo, N., Wooller, L., Hautmann, S., Rymer, H., 2007. Oscillations in hydrothermal systems as a source of periodic unrest at caldera volcanoes: Multiparameter insights from Nisyros, Greece. Geophys. Res. Lett., 34, L07307, doi: 10.1029/2007GL029594

Coppo, N., Schnegg, P.-A., Heise, W., Falco, P., Costa, R., 2008. Multiple caldera collapses inferred from the shallow electrical resistivity signature of the Las Cañadas caldera, Tenerife, Canary Islands. Journal of Volcanology and Geothermal Research 170, 153–166.

Coppo, N., Schnegg, P.-A., Falco, P., Costa, R., Burkhard, M., 2008. Structural pattern of the western Las Cañadas caldera (Tenerife, Canary Islands) revealed by audiomagnetotellurics. Swiss J. Geosci. 101, 409-413.

Coppo, N., Schnegg, P.-A., Falco, P., Costa, R., 2009. A deep scar in the flank of Tenerife (Canary Islands): Geophysical contribution to tsunami hazard assessment. Earth and Planetary Sci. Lett. 282, 65-68.


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Last revision 11.09.2009 ®P.-A. Schnegg