Conceptually, it does work... but if you do the whiteboard math on the EM signal you are trying to pick up via a seismic source, the numbers get really small really fast.
I would file it under the "check in a decade" technology when capacitive electrodes become more standardized and more field test cases are worked out. -TM On Sun, Sep 22, 2019 at 9:58 PM James Reid via SEGMIN < [email protected]> wrote: > Hi All – > > > > I was wondering if anyone out there had any experience with > electro-seismics, i.e. using a seismic source to stimulate an electrical > response from the ground. > > > > I have recently had a groundwater contamination client request an > electro-seismic survey, with the objective of estimating the aquifer > permeability ahead of drilling. When I said that the method was pretty > niche and of academic interest in comparison with TEM, electrical > resistivity imaging or NMR, they said “but we’ve already done some”. When > I read the report I was underwhelmed to say the least… while I think there > is some physical basis to the technique (I recall genuine papers by Anton > Kepic etc on piezoelectric effects etc), the company in question were > pseudoscientific at best in terms of the data processing and > interpretation, and their promises to clients. The report had been > commissioned (and accepted) by a very major global geotechnical company who > had clearly not employed a consultant geophysicist. > > > > There are several companies here in the Antipodes offering electro-seismic > surveys. These typically operate on the fringes of mainstream geophysics, > offering services to agriculture and groundwater. There is very little > information available on the physical basis of the method, or on its > practical limitations. Here is a link to one such company (chosen at > random – I am not picking on them because they are from New Zealand) > https://www.atsgeosuite.net/new-page. They have an intriguing sliding > price scale, where the client pays more for interpretation to larger depth > – I wish I had thought of that! > > > > Anyway, I wondered whether anyone had any genuine experience with > electro-seismics, and could provide more detail. Is it a mature enough > technique that I should be considering it for hydrogeological work? I > suspect the answer is no, but I would be interested in any comments. > > > > Cheers, > > > > James > > > > > > <http://www.mirageoscience.com/> > > > > > *James Reid, Director Asia-Pacific, Principal Consultant * > www.MiraGeoscience.com <http://www.mirageoscience.com/>*, **tel +61.419 > 748 009, 45 Ventnor Ave, West Perth WA 6005 Australia* > > > ----------------------- > SEGMIN community mailing list service ([email protected]). > Change your personal options here: > https://lists.geosoft.com/mailman/options/segmin/tpm319%40gmail.com > Colleagues can join here: > https://lists.geosoft.com/mailman/listinfo/segmin > Archives: https://lists.geosoft.com/mailman/private/segmin/ > NOTE that <Reply> will reply to all members of the list. > -- Thomas Martin (805) 904-9991
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