2 edition of Detection of SH-type seismic shear waves by means of angular accelerometers found in the catalog.
Bibliography: p. 6.
|Statement||U.S. Govt. Print. Off.|
|Publishers||U.S. Govt. Print. Off.|
|The Physical Object|
|Pagination||xvi, 121 p. :|
|Number of Pages||71|
|3||Geological Survey professional paper ;|
nodata File Size: 9MB.
¿uvres chirurgicales de P.J. Desault ... ou tableau de sa doctrine et de sa pratique dans le traitement des maladies externes
Fast polarization in the upper layer, perhaps most affected by the brittle deformation of the fault zone, is roughly fault-parallel, while fast polarization in the lower layer is roughly east—west, consistent with fast polarization farther inland in the extensional Basin and Range province.
The advantages of using these instruments are improved conductivity resolution and the ability to operate over terrain where current injection problems occur. This results in usable chargeability data at lower signal levels as compared to conventional IP receivers. The advantage of resistivity imaging is that by exploiting the ability to redundantly sample very large numbers of electrode combinations, a detailed resistivity image of the subsurface is developed.
The second measurement taken in IP surveys is the chargeability.
The location of the HS blue and HF orange injection intervals are shown, as well as the strain-monitoring borehole FBS2 and stress measurement borehole SBH4 used in this study.
For very high sensitivities is also used; this requires a dedicated process making it very expensive. This basic aspect of the present invention uniquely eliminates the previous inaccuracies associated with disregarding the effects of earth impedance variation at various locations, or drilling and blasting at the desired locations to physically measure such impedance.
Menard 2009, US 7,474,591 B2 uses 6 translational receivers to approximate the gradients and then the rotations, calling the output of 3 translations plus 3 rotations a 6 component system.
The presence of the weathered layer will change the amplitudes and the phases of the seismic waves that propagate through it.
Either in the surface large loop fixed source mode, or in the downhole configuration, the system detects potential massive sulphide zones and provides enhanced definition of conductive mineralization.
The HS4 seismicity produced three distinct cluster orientations: Cluster 1 formed from the injection interval and propagates sub-vertically in the ENE direction; Cluster 2 formed higher up in the injection interval and was oriented E—W, parallel to the shear zone S3.
The TEM47 is optimised for sounding work to a depth of approximately 70 metres.