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A NOTE ON EARTH STRAIN AND FAULT CREEP MEASUREMENTS IN INDIA
P.N. AGRAWAL AND A.S. ARYA
Paper No.: 158
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Vol.: 12
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No.: 3
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September, 1975
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pp. 128-133

Abstract
The design and development of “Portable Water Tube Tiltmeter” was taken up at the School of Research and Training in Earthquake Engineering, University of Roorkee, in early 1967. This marked the beginning of research directed to the measurements of earth strains and fault creep in terms of associated small scale movements. The possible application of these studies to the problem of earthquake prediction (Agrawal and Arya, 1974) has been the main long term objective in the plan of work. Field measurements were first started in 1968 using the’initially developed Portable Water Tube Tiltmeter to determine the creep along a plane of sub recent movement in the close vicinity of Krol thrust and also Nahan thrust, both these locations being near Dehradun. The design of this instrument has been improved in various stages taking advantage of the field experience gained through the use of initially developed system. The work of development of invar wire strainmeter and silica tube strainmeters was taken up in 1970and their first field applications were in 1972 and 1974 respectively. Since then these systems have been used at several important locations. Permanent observatory vaults are being set up at Pophali (Maharashtra), Kalawar (U. P.). Harabagh (H. P.) and Barapani (Meghalaya). A special vault has been built at Roorkee to permit extensive tests on the performance of these systems before their field use. The salient features and the present status of these developments are briefly reported in this note. Only those details are included which have not been published earlier.
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