EGU General Assembly 2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.

Quartz Rotation Sensor

Krishna Venkateswara1, Jerome Paros2, Paul Bodin3, William Wilcock4, and Harold J. Tobin3
Krishna Venkateswara et al.
  • 1Paroscientific Inc., Redmond, Washington, U.S.A
  • 2Quartz Seismic Sensors Inc., Redmond, Washington, U.S.A
  • 3Department of Earth and Space Sciences, University of Washington, Seattle, Washington, U.S.A.
  • 4School of Oceanography, University of Washington, Seattle,Washington, U.S.A.

A new high-precision ground- or platform-rotation sensor called the Quartz Rotation Sensor (QRS) has been developed and tested. The QRS is a mechanical angular accelerometer that senses rotational torque with an inherently digital, load-sensitive resonant quartz crystal. It is a portable broadband sensor with a noise floor measured to be ∼45 pico-radian/root (Hz) near 1 Hz, and a resonant period of ~10 s. The noise floor of the sensor near 0.1 Hz is more than two orders of magnitude lower than other similarly sized instruments enabling a dramatic improvement in ability to measure rotational teleseismic signals and tilt contamination in horizontal seismometers. We will present details of the sensor and measurements of rotational components of teleseismic waves recorded with the sensor at a vault. The QRS is useful for rotational seismology and for improving low-frequency seismic isolation in demanding applications such as the Laser Interferometer Gravitational-Wave Observatories.

How to cite: Venkateswara, K., Paros, J., Bodin, P., Wilcock, W., and Tobin, H. J.: Quartz Rotation Sensor, EGU General Assembly 2022, Vienna, Austria, 23–27 May 2022, EGU22-13511,, 2022.