Post‐seismic permeability change in a shallow fractured aquifer following a M L 5.1 earthquake (Fourbanne karst aquifer, Jura outermost thrust unit, eastern France)

Post‐seismic permeability change in a shallow fractured aquifer following a M L 5.1 earthquake (Fourbanne karst aquifer, Jura outermost thrust unit, eastern France)

Following a M L 5.1 earthquake in eastern France, a post‐seismic 12‐day long electrical conductivity increase was recorded in the water discharging from a karst aquifer located 3 km from the epicentre. We attribute this to a permeability enhancement which allowed long‐residence time water from low‐p...

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Bibliographic Details
Published in:Geophysical research letters Vol. 32; no. 18
Main Authors: Charmoille, A., Fabbri, O., Mudry, J., Guglielmi, Y., Bertrand, C.
Format: Journal Article
Language:English
Published: American Geophysical Union 28-09-2005
Subjects:
Sciences of the Universe
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Summary:Following a M L 5.1 earthquake in eastern France, a post‐seismic 12‐day long electrical conductivity increase was recorded in the water discharging from a karst aquifer located 3 km from the epicentre. We attribute this to a permeability enhancement which allowed long‐residence time water from low‐permeability fractures located in the saturated zone to be expelled. The permeability enhancement shows that shallow aquifers can be significantly deformed for several days by moderate magnitude earthquakes.
ISSN:0094-8276
1944-8007
DOI:10.1029/2005GL023859