Note: Rotaphone, a new self-calibrated six-degree-of-freedom seismic sensor

Journal Article · Wed Aug 15 00:00:00 EDT 2012 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.4747713· OSTI ID:22093712

Brokesova, Johana ^[1]; Malek, Jiri ^[2]; Evans, John R. ^[3]

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1. Faculty of Mathematics and Physics, Charles University, 180 00 Prague (Czech Republic)
2. Institute of Rock Structure and Mechanics, ASCR, 182 09 Prague (Czech Republic)
3. U.S. Geological Survey, Menlo Park, California 94025 (United States)

We have developed and tested (calibration, linearity, and cross-axis errors) a new six-degree-of-freedom mechanical seismic sensor for collocated measurements of three translational and three rotational ground motion velocity components. The device consists of standard geophones arranged in parallel pairs to detect spatial gradients. The instrument operates in a high-frequency range (above the natural frequency of the geophones, 4.5 Hz). Its theoretical sensitivity limit in this range is 10{sup -9} m/s in ground velocity and 10{sup -9} rad/s in rotation rate. Small size and weight, and easy installation and maintenance make the instrument useful for local-earthquake recording and seismic prospecting.

• OSTI ID: 22093712
• Journal Information: Review of Scientific Instruments, Vol. 83, Issue 8; Other Information: (c) 2012 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0034-6748
• Country of Publication: United States
• Language: English

Related Subjects

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
58 GEOSCIENCES
CALIBRATION
DEGREES OF FREEDOM
EARTHQUAKES
EQUIPMENT
ERRORS
FREQUENCY RANGE
GROUND MOTION
INSTALLATION
MAINTENANCE
PROSPECTING
RADIATION DOSE UNITS
ROTATION
SEISMIC DETECTORS
SENSITIVITY
STANDARDS
VELOCITY
WEIGHT