|Detector #6 for Detection of
Significant Abnormal Local Gravity
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Section 2.3 to 2.8 on my Web Page (1) at:
Web Page (1): http://www.shltrip.com/Magnetic_Hill.html
describe five methods (detectors) for detection of significant abnormal local gravity at special locations of
Gravity Hills and Mystery Spots.
In addition to Detectors #1 to #5 described above, my long-term friend and colleague in Bell Labs, Thomas
West proposes Detector #6 for detection of significant abnormal local gravity. He sent me an e-mail describing
his proposal and gave me permission to describe his proposal on this web page.
His proposal is to use land survey instrument to do precision elevation angle measurements.
For example, use Figure E-1 in Appendix E in the following Web Page (4) for illustration.
Web Page (4): http://www.shltrip.com/My_Personal_Experience_on_a_Gravity_Hill.html
We can set up a land survey instrument at the bottom of a slope and make precision measurement of the
elevation angle of the top of the slope as viewed from the bottom. Then we move the land survey instrument to
the top of the slope and measure the elevation angle of the bottom of the slope as viewed from the top.
If there is no abnormal local gravity on this slope, then the two measured elevation angles will be equal in
magnitude but opposite in sign. In other words, the elevation angle as viewed from the bottom is positive
elevation angle while the elevation angle as viewed from the top is negative. But the magnitudes (i.e., absolute
value) of these two measured elevation angles will be equal.
On the other hand, if significant abnormal local gravity exists on such Gravity Hill and the source of such
significant abnormal local gravity is a very small and compact nugget of high density dark matter as described
in my companion Web Page (2) at:
Web Page (2): http://www.shltrip.com/Oregon-Vortex.html
then the strengths of abnormal local gravity at the bottom and at the top of the Gravity Hill will be different
because of difference in distance to the small and compact source of abnormal local gravity. Use Figure E-2 in
Appendix E in We Page (4) for illustration. Then the angle of the tilted (erroneous) reference horizontal plane at
the bottom will be different from that at the top because of different strength of abnormal local gravity. Then
the elevation angle measured by bubble based instrument at the bottom will be different from that measured at
the top because of difference in the tilted angle of the (erroneous) reference horizontal plane.
Therefore, if the absolute value of the elevation angle measured at the bottom of the slope differs substantially
from that measured at the top of the slope, it is an indication of existence of significant abnormal local gravity
on such Gravity Hill.
In this way, the bubble based land survey instrument with its capability for precision measurement of elevation
angle can be a very sensitive detector of existence of significant abnormal local gravity.
In practice, the pair of measurement points does not have to be limited only to the bottom and the top of the
Gravity Hill. There are plenty of freedoms to choose many other pairs of points in that area for such
measurements and comparison, and the principle for detection of abnormal local gravity still applies. In fact, it
is desirable to repeat such measurements several times with several different pairs of selected points in that
It is noted that this Detector #6 will also work even if the pair of points are one a horizontal flat plane with no
elevation difference. As long as significant abnormal local gravity exits in that flat area, the elevation angles
measured from those two points will be different because of the effect of significant abnormal local gravity on
the bubble level in the land survey instrument.
Such Detector #6 will work well if the selected measurement location is not too close to the location of the
compact nugget of very high density dark matter. In case if the land survey instrument is very close to the
location of the compact nugget of very high density dark matter, the land survey instrument will act in a very
strange behavior similar to that encountered by the three land surveyors in Michigan as described in Section
2.3 in the first web page listed above. When such strange behavior of land survey instrument is encountered,
such strange behavior alone is a strong indication of existence of very strong abnormal local gravity at that