Journal cover Journal topic
Natural Hazards and Earth System Sciences An interactive open-access journal of the European Geosciences Union
Nat. Hazards Earth Syst. Sci., 8, 1341-1347, 2008
http://www.nat-hazards-earth-syst-sci.net/8/1341/2008/
doi:10.5194/nhess-8-1341-2008
© Author(s) 2008. This work is distributed
under the Creative Commons Attribution 3.0 License.
 
08 Dec 2008
Simple model for post seismic ionospheric disturbances above an earthquake epicentre and along connecting magnetic field lines
R. Marchand1,2 and J. J. Berthelier1 1CETP/IPSL, Saint-Maur-des-Fossés, France
2Department of Physics, University of Alberta, Canada
Abstract. The detection of ionospheric disturbances associated with seismic activity is one of the main objectives of the DEMETER micro-satellite. Its scientific payload provides a comprehensive set of electron and ion measurements. The present work describes a simple model of post-seismic disturbances in the ionosphere above the epicentre. Following a major seism, the neutral atmosphere is assumed to be subject to an acoustic pulse propagating upward, to high altitudes. By coupling this perturbation to the two-dimensional ionospheric model SAMI2 it is then possible to calculate the variations in a number of plasma parameters in the plume region and along connecting magnetic field lines, for an event of representative magnitude. The feasibility of identifying the signature of seismic events from satellite observations is then assessed in view of representative DEMETER measurements and of their natural variability.

Citation: Marchand, R. and Berthelier, J. J.: Simple model for post seismic ionospheric disturbances above an earthquake epicentre and along connecting magnetic field lines, Nat. Hazards Earth Syst. Sci., 8, 1341-1347, doi:10.5194/nhess-8-1341-2008, 2008.
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