Deep Borehole Strainmeter to Measure Earth Strain
Final scientific rept. 15 Jun 1970-30 Sep 1974
DEVELCO INC MOUNTAIN VIEW CA
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A highly sensitive multicomponent strainmeter was designed for use in deep boreholes. A shallow-hole version of the deep-hole strainmeter was constructed and tested by operating it in a mine tunnel near the seismically active area around Mina, Nevada. The ability of the strainmeter to record tidal strains of approximately 1 x 10 to the minus 8th power in the horizontal direction and approximately 1 x 10 to the minus 9th power in the vertical direction was demonstrated.
- Test Facilities, Equipment and Methods