Method for Calculating Self-Noise Spectra and Operating Ranges for Seismographic Inertial Sensors and Recorders

Evans, John R.; Followill, Fred E.; Hutt, C. R.; Kromer, R.P.; Nigbor, Robert L.; Ringler, Adam T.; Steim, Joseph M.; Wielandt, Erhard

doi:10.1785/gssrl.81.4.640

Cited by 38 publications

(31 citation statements)

References 4 publications

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“…The noise floor is bounded by the seismometer, the installation technique and the acquisition unit at the seismic station. While the self-noise of dataloggers can be measured with a short-circuited input, this is not the case for the self-noise measurement of broadband seismometers (Evans et al 2010). The self-noise of seismometers is usually represented by the power spectral density (PSD) function.…”

Section: Introductionmentioning

confidence: 99%

Seismometer self-noise estimation using a single reference instrument

Tasič

Runovc

2011

J Seismol

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A new method is presented for the self-noise estimation of a seismometer using a single, side-by-side, reference instrument and taking into consideration the misalignment in the orientation of both seismometers. The self-noise of seismometers is extracted directly from the measurements without using any information relating to the transfer functions. This procedure can be applied if the self-noise of the reference seismometer is well known and defined, or if the self-noise of the reference seismometer is sufficiently below the selfnoise of the tested instrument and can be neglected. The latter case applies to this study. An algorithm is also developed where we apply self-noise data in order to determine the orientation misalignment between two seismometers, which is then resolved in threedimensional space. This new method provides an estimate of the self-noise and can also be used to extract some parameters of the installed seismic system in comparison with the reference seismic system, such as generator constants and seismometer orientation or to eliminate unwanted noise sources, which have their origin in the seismic station's design. The new technique was applied to the CMG-3ESPC and CMG-40T seismometers, where an STS-2 instrument served as the reference seismometer.

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Section: Introductionmentioning

confidence: 99%

Seismometer self-noise estimation using a single reference instrument

Tasič

Runovc

2011

J Seismol

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“…The discussion on data selection of time segments becomes even more controversial when limited amounts of data are available. By using multiple quiet time segments, it is possible to understand the self-noise of an instrument in at least a best-case scenario (Ringler and Hutt 2010). One such example of a best-case scenario, along with a self-noise estimate using the median of multiple tests, is shown in Fig.…”

Section: Data Selectionmentioning

confidence: 99%

“…For very broadband seismometers, it is often of interest to understand the self-noise for periods up to several thousands of seconds, which corresponds to a total window length of at least 8 h divided into overlapping sub-windows, each of about an hour (e.g., Table 1 of Evans et al 2010).…”

Section: Analysis Parametersmentioning

confidence: 99%

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Seismometer Self-Noise and Measuring Methods

Ringler

Sleeman

Hutt

et al. 2014

Encyclopedia of Earthquake Engineering

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“…However, the elevated self-noise of strongmotion accelerometers in conjunction with the low site noise in the Albuquerque Seismological Laboratory's (ASL) underground vault (Fig. 2) allows us to get accurate estimates of strong-motion accelerometer self-noise without using coherence analysis techniques (e.g., Holcomb, 1989, or Sleeman et al, 2006Evans et al, 2010;. Of course, this is only true when the accelerometer's self-noise is well above the site noise (Fig.…”

Section: Introductionmentioning

confidence: 99%