New technology

Most unusual....what's with the cockroach in the box? T-hunters often use "live pointers" to locate caches, but this one beats them all!

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OK so there really wasn't a cockroach in the box then eh? It would be interesting to see how this technology works on land targets as well. Do keep us posted.

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geophysical hum, I had to look thay one up.  modern cockroaches, do they wear their paints real low around their butt's. Just kidding guys, I just thought I would try to be apart of the fun. 

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		Quote:			Posted by Sedonan
	Actually, the use of the term magnetometer is a misnomer. It does not react to magnetic fields so much as to telluric currents. The units that we designed were used to find ore deposits in the western states in the manner of what is used in deep oil exploration. The fact that both of us are professional divers with over 40 years apiece salvaging old shipwrecks, led us to believe this technology could find shipwrecks from a distance. If you have read the thread by Terry Armstrong above, you will see that is exactly what they do. Bill

Bill, I don't understand why you seem argumentative when everyone here is agreeing that it is fabulous technology. The joke about the cockroaches was made on another forum altogether. No disrespect to you or your equipment has been demonstrated at all.

As to a magnetometer detecting what it does, I'm afraid that those alleged telluric currents are created by the earth's magnetic field and cannot be sensed in the air or in water. They are theoretical currents, not measurable ones. What a magnetometer does is sense changes in magnetic field density or flux field which indicate a possible telluric current.

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		Quote:			Posted by Sedonan
	Please point out where in the above post that I have been argumentative. As for your comments that telluric currents do not exist, I refer you to Dobrin: "Introduction To Geophysical Prospecting", and James Wait: "Geo-Electromagnetism". If that is the best that you can do to try to discredit, please do not refer to me directly again.

You argue points in which people are in agreement with your point of view. That's argumentative. As to telluric currents, they are not something I say don't exist. I say that they are theoretical which means they have not yet ever been measured directly but only by inference. I trust you know the difference. A current in a wire, for example, can and does cause a change in the wire which can be measured. The telluric currents you describe may be caused by changes in the earth's magnetic field or by the solar fields which cause the magnetosphere of the earth to change. But has one ever been measured? And then verified to the point of making it something other than a theory?

The magnetometer is a good name for the measuring device and you are free to disagree with the nomenclature. And you did. But the device is referred to by that name as part of a longer name such as "Flux Gate Magnetometer." It is shortened as part of the vernacular of the treasure hunter. An electronics design engineer would refer to it by its full name. But you will never hear of it being referred to as a Telluric Current Sensing Magnetometer because that would truly be a misnomer.

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