On the application of fiber optic gyroscopes for detection of seismic rotations

Velikoseltsev, A.; Yankovsky, A. A.; Wells, Jon‐Paul R.; Boronachin, Alexander M.; Ткаченко, А. Н.

doi:10.1007/s10950-012-9282-y

Cited by 30 publications

(14 citation statements)

References 16 publications

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“…Recently developed high-resolution ring-laser gyroscopes [Schreiber et al, 2009b] produced the first consistent observation of teleseismic rotational ground motions in the vertical component, also known as torsion [Igel et al, 2005[Igel et al, , 2007. With the development of fiber optic techniques, similar measurements for horizontal-component rotation are within reach [e.g., Bernauer et al, 2012a;Schreiber et al, 2009a;Velikoseltsev et al, 2012].…”

Section: Nonuniqueness In Finite Source Inversionsmentioning

confidence: 99%

“…A high-resolution, field deployable, and affordable instrument that measures rotation is currently not available. However, the construction of rotation sensors based on ring-laser technology [e.g., Schreiber et al, 2009aSchreiber et al, , 2009bVelikoseltsev et al, 2012], adapted gyroscopes [e.g., Bernauer et al, 2012a, or systems of multiple geophones [e.g., Brokešová and Málek, 2010;Brokešová et al, 2012] is rapidly progressing. In the course of these instrument developments, the admissible measurement errors for specific applications must be established.…”

Section: Measuring Rotational Ground Motionsmentioning

confidence: 99%

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Reducing nonuniqueness in finite source inversion using rotational ground motions

2014

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We assess the potential of rotational ground motion recordings to reduce nonuniqueness in kinematic source inversions, with emphasis on the required measurement accuracy of currently developed rotation sensors. Our analysis is based on synthetic Bayesian finite source inversions that avoid linearizations and provide a comprehensive quantification of uncertainties and trade-offs. Using the fault and receiver geometry of the Tottori 2000 earthquake as a test bed, we perform inversions for two scenarios: In scenario I, we use translational velocity recordings only. In scenario II, we randomly replace half of the velocity recordings by rotation recordings, thus keeping the total amount of data constant. To quantify the noise-dependent impact of rotation recordings, we perform a sequence of inversions with varying noise levels of rotations relative to translations. Our results indicate that the incorporation of rotational ground motion recordings can significantly reduce nonuniqueness in finite source inversions, provided that measurement uncertainties are similar to or below the uncertainties of translational velocity recordings. When this condition is met, rupture velocity and rise time benefit most from rotation data. The trade-offs between both parameters are then strongly reduced, and the information gain nearly doubles. This suggests that rotational ground motion recordings may improve secondary inferences that rely on accurate information about rise time and rupture velocity. These include frictional properties of the fault, radiation directivity, and ground motion in general.

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Section: Nonuniqueness In Finite Source Inversionsmentioning

confidence: 99%

Section: Measuring Rotational Ground Motionsmentioning

confidence: 99%

Reducing nonuniqueness in finite source inversion using rotational ground motions

2014

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“…In geophysics, a gyrometer can be used for local monitoring of the variations in Earth's rotation rate due to seismic or tectonic-plate displacements. 27,28 In the field of general relativity, for example, tests of the geodetic and Lense-Thirring effects 29,30 can also be foreseen given the long-term sensitivity experimentally demonstrated in the lab. 31 Several research groups around the world launched the development of high precision compact portable atom interferometers around 20 years ago.…”

Section: Introductionmentioning

confidence: 99%

Compact chip-scale guided cold atom gyrometers for inertial navigation: Enabling technologies and design study

Alzar

2019

AVS Quantum Science

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This work reviews the topic of rotation sensing with compact cold atom interferometers. A representative set of compact free-falling cold atom gyroscopes is considered because, in different respects, they establish a rotation-measurement reference for cold guided-atom technologies. The review first discusses enabling technologies relevant to a set of key functional building blocks of an atom chip-based compact inertial sensor with cold guided atoms. These functionalities concern the accurate and reproducible positioning of atoms to initiate a measurement cycle, the coherent momentum transfer to the atom wave packets, the suppression of propagation-induced decoherence due to potential roughness, the on-chip detection, and the vacuum dynamics because of its impact on the sensor stability, which is due to measurement dead time. Based on the existing enabling technologies, the design of an atom chip gyroscope with guided atoms is formalized using a design case that treats design elements such as guiding, fabrication, scale factor, rotation-rate sensitivity, spectral response, important noise sources, and sensor stability. arXiv:1912.06851v1 [quant-ph]

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“…Devices that are capable of measuring in this range of horizontal-component rotation rate amplitudes, e.g., Rotaphones, have been developed in recent years (Guattari, 2016;Málek, 2013, 2015). Fiber optic techniques that are able to measure in this range are currently under development (Velikoseltsev et al, 2012;Schreiber et al, 2009). …”

Section: Discussionmentioning

confidence: 99%

“…Since then, many scientists commended the benefits of studying rotational ground motions for Earth sciences (Twiss et al, 1993;Spudich et al, 1995;Takeo and Ito, 1997;Igel et al, 2007;Igel, 2009), physics (DeSalvo, 2009;Lantz et al, 2009), and also for engineering applications (Trifunac, 2009). In the last years, new instruments, e.g., ring-laser technology (Schreiber et al, 2009;Velikoseltsev et al, 2012) or adapted gyroscopes (Bernauer et al, 2012), that are capable of measuring rotational motions with a much higher precision have been developed and possibly bring new insight into seismological applications.…”

Section: Introductionmentioning

confidence: 99%

Improved finite-source inversion through joint measurements of rotational and translational ground motions: a numerical study

Reinwald¹,

Bernauer

Igel

et al. 2016

Solid Earth

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Abstract. With the prospects of seismic equipment being able to measure rotational ground motions in a wide frequency and amplitude range in the near future, we engage in the question of how this type of ground motion observation can be used to solve the seismic source inverse problem. In this paper, we focus on the question of whether finite-source inversion can benefit from additional observations of rotational motion. Keeping the overall number of traces constant, we compare observations from a surface seismic network with 44 three-component translational sensors (classic seismometers) with those obtained with 22 sixcomponent sensors (with additional three-component rotational motions). Synthetic seismograms are calculated for known finite-source properties. The corresponding inverse problem is posed in a probabilistic way using the Shannon information content to measure how the observations constrain the seismic source properties. We minimize the influence of the source receiver geometry around the fault by statistically analyzing six-component inversions with a random distribution of receivers. Since our previous results are achieved with a regular spacing of the receivers, we try to answer the question of whether the results are dependent on the spatial distribution of the receivers. The results show that with the six-component subnetworks, kinematic source inversions for source properties (such as rupture velocity, rise time, and slip amplitudes) are not only equally successful (even that would be beneficial because of the substantially reduced logistics installing half the sensors) but also statistically inversions for some source properties are almost always improved. This can be attributed to the fact that the (in particular vertical) gradient information is contained in the additional motion components. We compare these effects for strike-slip and normal-faulting type sources and confirm that the increase in inversion quality for kinematic source parameters is even higher for the normal fault. This indicates that the inversion benefits from the additional information provided by the horizontal rotation rates, i.e., information about the vertical displacement gradient.

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On the application of fiber optic gyroscopes for detection of seismic rotations

Cited by 30 publications

References 16 publications

Reducing nonuniqueness in finite source inversion using rotational ground motions

Reducing nonuniqueness in finite source inversion using rotational ground motions

Compact chip-scale guided cold atom gyrometers for inertial navigation: Enabling technologies and design study

Improved finite-source inversion through joint measurements of rotational and translational ground motions: a numerical study

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