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Expendable bubble tiltmeter for geophysical monitoring

January 1, 1983

An unusually rugged highly sensitive and inexpensive bubble tiltmeter has been designed, tested, and built in quantity. These tiltmeters are presently used on two volcanoes and an Alaskan glacier, where they continuously monitor surface tilts of geological interest. This paper discusses the mechanical, thermal, and electric details of the meter, and illustrates its performance characteristics in both large (>10-4 radian) and small (<10-6 radian) tilt environments. The meter's ultimate sensitivity is better than 2??10-8 radians rms for short periods (hours), and its useful dynamic range is greater than 10 4. Included is a short description of field use of the instrument for volcano monitoring.

Publication Year 1983
Title Expendable bubble tiltmeter for geophysical monitoring
DOI 10.1063/1.1137408
Authors J.A. Westphal, M.A. Carr, W.F. Miller, D. Dzurisin
Publication Type Article
Publication Subtype Journal Article
Series Title Review of Scientific Instruments
Index ID 70011271
Record Source USGS Publications Warehouse