Relevant bibliographies by topics / Broadband Seismometers

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
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Academic literature on the topic 'Broadband Seismometers'

Author: Grafiati
Published: 4 June 2021
Last updated: 1 February 2022

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Journal articles on the topic "Broadband Seismometers"

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Stähler, S. C., K. Sigloch, K. Hosseini, W. C. Crawford, G. Barruol, M. C. Schmidt-Aursch, M. Tsekhmistrenko, J. R. Scholz, A. Mazzullo, and M. Deen. "Performance report of the RHUM-RUM ocean bottom seismometer network around La Réunion, western Indian Ocean." Advances in Geosciences 41 (February 2, 2016): 43–63. http://dx.doi.org/10.5194/adgeo-41-43-2016.

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Abstract. RHUM-RUM is a German-French seismological experiment based on the sea floor surrounding the island of La Réunion, western Indian Ocean (Barruol and Sigloch, 2013). Its primary objective is to clarify the presence or absence of a mantle plume beneath the Reunion volcanic hotspot. RHUM-RUM's central component is a 13-month deployment (October 2012 to November 2013) of 57 broadband ocean bottom seismometers (OBS) and hydrophones over an area of 2000 × 2000 km2 surrounding the hotspot. The array contained 48 wideband OBS from the German DEPAS pool and 9 broadband OBS from the French INSU pool. It is the largest deployment of DEPAS and INSU OBS so far, and the first joint experiment. This article reviews network performance and data quality: of the 57 stations, 46 and 53 yielded good seismometer and hydrophone recordings, respectively. The 19 751 total deployment days yielded 18 735 days of hydrophone recordings and 15 941 days of seismometer recordings, which are 94 and 80 % of the theoretically possible yields. The INSU seismic sensors stand away from their OBS frames, whereas the DEPAS sensors are integrated into their frames. At long periods (> 10 s), the DEPAS seismometers are affected by significantly stronger noise than the INSU seismometers. On the horizontal components, this can be explained by tilting of the frame and buoy assemblage, e.g. through the action of ocean-bottom currents, but in addition the DEPAS intruments are affected by significant self-noise at long periods, including on the vertical channels. By comparison, the INSU instruments are much quieter at periods > 30 s and hence better suited for long-period signals studies. The trade-off of the instrument design is that the integrated DEPAS setup is easier to deploy and recover, especially when large numbers of stations are involved. Additionally, the wideband sensor has only half the power consumption of the broadband INSU seismometers. For the first time, this article publishes response information of the DEPAS instruments, which is necessary for any project where true ground displacement is of interest. The data will become publicly available at the end of 2017.
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Tape, Carl, Adam T. Ringler, and Don L. Hampton. "Recording the Aurora at Seismometers across Alaska." Seismological Research Letters 91, no. 6 (July 29, 2020): 3039–53. http://dx.doi.org/10.1785/0220200161.

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Abstract We examine three continuously recording data sets related to the aurora: all-sky camera images, three-component magnetometer data, and vertical-component, broadband seismic data as part of the EarthScope project (2014 to present). Across Alaska there are six all-sky cameras, 13 magnetometers, and >200 seismometers. The all-sky images and magnetometers have the same objective, which is to monitor space weather and improve our understanding of auroral activity, including the influence on magnetic fields in the ground. These variations in the magnetic field are also visible on seismometers, to the extent that during an auroral event, the long-period (40–800 s) waves recorded by a seismometer are magnetic field variations, not true ground motion. Although this is a problem—one that can be rectified with magnetic shielding at each seismometer site—it is also an opportunity because the present seismic array in Alaska is much broader than the coverage by magnetometers and all-sky cameras. Here we focus on three aurora events and document a direct link between aurora images in the night sky and seismometer recordings on ground. Simultaneous recordings by magnetometers provide a critical link between the sky images and the seismometer recordings. We document qualitative correlations among sky, magnetic, and seismic data. The findings suggest that the signature of auroral activity is widespread across seismometers in Alaska, implying that the seismic array could be used to enhance the spatial resolution of the existing network of all-sky cameras and magnetometers. Future efforts to improve the multisensor seismic stations in Alaska, for the purpose of monitoring seismic and auroral activity, should consider installation of all-sky cameras, installation of magnetometers, and magnetic shielding of seismic sensors.
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Marusiak, Angela G., Nicholas C. Schmerr, Daniella N. DellaGiustina, Brad Avenson, S. Hop Bailey, Veronica J. Bray, Juliette I. Brodbeck, et al. "The Deployment of the Seismometer to Investigate Ice and Ocean Structure (SIIOS) in Northwest Greenland: An Analog Experiment for Icy Ocean World Seismic Deployments." Seismological Research Letters 92, no. 3 (March 17, 2021): 2036–49. http://dx.doi.org/10.1785/0220200291.

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Abstract In anticipation of future spacecraft missions to icy ocean worlds, the Seismometer to Investigate Ice and Ocean Structure (SIIOS) was funded by National Aeronautics and Space Administration, to prepare for seismologic investigations of these worlds. During the summer of 2018, the SIIOS team deployed a seismic experiment on the Greenland ice sheet situated, approximately, 80 km north of Qaanaaq, Greenland. The seismometers deployed included one Trillium 120 s Posthole (TPH) broadband seismometer, 13 Silicon Audio flight-candidate seismometers, and five Sercel L28 4.5 Hz geophones. Seismometers were buried 1 m deep in the firn in a cross-shaped array centered on a collocated TPH and Silicon Audio instrument. One part of the array consisted of Silicon Audio and Sercel geophones situated 1 m from the center of the array in the ordinal directions. A second set of four Silicon Audio instruments was situated 1 km from the center of the array in the cardinal directions. A mock-lander spacecraft was placed at the array center and instrumented with four Silicon Audio seismometers. We performed an active-source experiment and a passive-listening experiment that lasted for, approximately, 12 days. The active–source experiment consisted of 9–12 sledgehammer strikes to an aluminum plate at 10 separate locations up to 100 m from the array center. The passive experiment recorded the ice-sheet ambient background noise, as well as local and regional events. Both datasets will be used to quantify differences in spacecraft instrumentation deployment strategies, and for evaluating science capabilities for single-station and small-aperture seismic arrays in future geophysical missions. Our initial results indicate that the flight-candidate seismometer performs comparably to the TPH at frequencies above 0.1 Hz and that instruments coupled to the mock-lander perform comparably to ground-based instrumentation in the frequency band of 0.1–10 Hz. For future icy ocean world missions, a deck-coupled seismometer would perform similarly to a ground-based deployment across the most frequency bands.
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Gerner, A., and G. Bokelmann. "Instrument self-noise and sensor misalignment." Advances in Geosciences 36 (September 17, 2013): 17–20. http://dx.doi.org/10.5194/adgeo-36-17-2013.

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Abstract. In this study we investigate self-noise of RefTekTM 151-60A "Observer" broadband seismometers (flat to velocity between 50 Hz down to T0=60 s, f0≈17 mHz) using the coherency analysis method introduced by Sleeman et al. (2006). We present a self-noise model for this type of sensor and compare it to the self-noise models of the standard observatory sensor STS-2 (Streckeisen) and RefTek's 151-120 broadband seismometer, which both have natural periods T0 of 120 s. We further report on the sensitivity of this technique to sensor misalignment and our success of eliminating leakage of the omnipresent microseism noise into self-noise estimates by numerically rotating seismic traces in order to find real self-noise.
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Vasilyev, I. M., Yu P. Kozhevnikov, S. A. Matsiyevskiy, V. G. Mezhberg, A. V. Rykov, and I. V. Ulomov. "The prospects for modernizing very broadband seismometers." Seismic Instruments 45, no. 1 (June 2009): 60–68. http://dx.doi.org/10.3103/s0747923909010101.

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YOSHIDA, Yasuhiro, Kenji KANJO, Satoshi HARADA, Kenji FUJIWARA, Toshiki OHTAKI, Akiko TANAKA, Satoshi KANESHIMA, et al. "Installation Experiment of Broadband Seismometers in Shallow Vaults." Zisin (Journal of the Seismological Society of Japan. 2nd ser.) 54, no. 1 (2001): 9–16. http://dx.doi.org/10.4294/zisin1948.54.1_9.

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Chen, Jui-Chun Freya, Wu-Cheng Chi, and Chu-Fang Yang. "Seismically Derived Ground Tilts Related to the 2010 Chilean Tsunami." Seismological Research Letters 92, no. 4 (March 24, 2021): 2172–81. http://dx.doi.org/10.1785/0220200288.

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Abstract Developing new ways to observe tsunami contributes to tsunami research. Tidal and deep-ocean gauges are typically used for coastal and offshore observations. Recently, tsunami-induced ground tilts offer a new possibility. The ground tilt signal accompanied by 2010 Mw 8.8 Chilean earthquake were observed at a tiltmeter network in Japan. However, tiltmeter stations are usually not as widely installed as broadband seismometers in other countries. Here, we studied broadband seismic records from Japan’s F-net and found ground tilt signals consistent with previously published tiltmeter dataset for this particular tsunamic event. Similar waveforms can also be found in broadband seismic networks in other countries, such as Taiwan, as well as an ocean-bottom seismometer. We documented a consistent time sequence of evolving back-azimuth directions of the tsunami waves at different stages of tsunami propagation through beamforming-frequency–wavenumber analysis and particle-motion analysis; the outcomes are consistent with the tsunami propagation model provided by the Pacific Tsunami Warning Center. These results shown that dense broadband seismic networks can provide a useful complementary dataset, in addition to tiltmeter arrays and other networks, to study or even monitor tsunami propagation using arrayed methods.
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Anglade, A., A. Lemarchand, J. M. Saurel, V. Clouard, M. P. Bouin, J. B. De Chabalier, S. Tait, et al. "Significant technical advances in broadband seismic stations in the Lesser Antilles." Advances in Geosciences 40 (April 10, 2015): 43–50. http://dx.doi.org/10.5194/adgeo-40-43-2015.

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Abstract. In the last few years, French West Indies observatories from the Institut de Physique du Globe de Paris (IPGP), in collaboration with The UWI Seismic Research Centre (SRC, University of West Indies), have modernized the Lesser Antilles Arc seismic and deformation monitoring network. 15 new, permanent stations have been installed that strengthen and expand its detection capabilities. The global network of the IPGP-SRC consortium is now composed of 20 modernized stations, all equipped with broadband seismometers, strong motion sensors, Global Positioning System (GPS) sensors and satellite communication for real-time data transfer. To enhance the sensitivity and reduce ambient noise, special efforts were made to improve the design of the seismic vault and the original Stuttgart shielding of the broadband seismometers (240 and 120s corner period). Tests were conducted for several months, involving different types of countermeasures, to achieve the highest performance level of the seismometers. GPS data, realtime and validated seismic data (only broadband) are now available from the IPGP data centre (http://centrededonnees.ipgp.fr/index.php?&lang=EN). This upgraded network feeds the Caribbean Tsunami Warning System supported by UNESCO and establishes a monitoring tool that produces high quality data for studying subduction and volcanic processes in the Lesser Antilles arc.
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Zecevic, Megan, Thomas S. Eyre, and David W. Eaton. "Static Ground Displacement for an Induced Earthquake Recorded on Broadband Seismometers." Bulletin of the Seismological Society of America 110, no. 5 (August 4, 2020): 2216–24. http://dx.doi.org/10.1785/0120200074.

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ABSTRACT Using geodetic methods, significant static ground deformation has been observed for many large natural earthquakes. Some of the largest earthquakes induced by hydraulic-fracturing operations have been observed in the Western Canada Sedimentary Basin; however, because of the size and depths of these events, the associated static ground deformations have not yet been observed using traditional geodetic techniques. A seismic processing technique, developed for small volcano-seismic events, has the potential to resolve micrometer-scale static displacements using broadband seismic data. In this study, we test this processing method using vertical component broadband recordings of an Mw 4.1 event acquired at four nearby broadband seismometers. Estimated static displacements at the four stations are compared with the theoretical surface displacement field for a dislocation on a finite rectangular source within a homogeneous, elastic half-space. The theoretical displacements have the same polarities as the measured displacements across the seismic network and have similar amplitudes for three of the four stations. However, one station yielded unstable results, which shows that care must be taken when using this method. These results suggest that this processing method has potential for obtaining surface deformation for small to moderate-sized earthquakes using broadband data.
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Haney, M. M., J. Power, M. West, and P. Michaels. "Causal Instrument Corrections for Short-Period and Broadband Seismometers." Seismological Research Letters 83, no. 5 (September 1, 2012): 834–45. http://dx.doi.org/10.1785/0220120031.

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Dissertations / Theses on the topic "Broadband Seismometers"

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Rasmussen, Tyler Wyatt. "Comparison of 4.5 Hz Geophones and a Broadband Seismometer in a Real Field Deployment." Thesis, Virginia Tech, 2019. http://hdl.handle.net/10919/90292.

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An analysis of waveforms, power spectral density and array responses was performed using geophones and broadband seismometers, co-deployed as part of a geologically motivated study. Broadband seismometers record excellent waveforms but, due to cost and deployment effort, wavefields are usually spatially aliased above ~0.1 Hz. Industry rapidly deploys many thousands of inexpensive, passive geophones to record full, unaliased seismic wavefields; however, waveform quality is limited below the instrument's natural frequency of ≥2 Hz. In 2012, coincident passive and controlled-source seismic surveys were deployed to investigate tectonics in Idaho and Oregon. Broadband stations were deployed at quiet sites every 15 km, taking experienced professionals >1 person-days per station. Fifty 4.5 Hz geophones and "Texan" seismographs at 200-m spacing were deployed per person-day by inexperienced students. Geophone data were continuously recorded for 3 nights and 1 day, while broadband seismometers were deployed for ~2 years. The spectral and array responses of these real deployments were compared. For a M7.7 teleseismic event, the broadband seismometer and geophone recorded nearly identical waveforms down to <0.03 Hz (32 s) and matching power spectral density down to 0.02 Hz (50 s). For quiet ambient noise, the waveforms strongly correlate down to <0.25 Hz (4 s) and the power spectral density match to the low-frequency side of the microseismic peak at ~0.15 Hz (~7 s). By deploying a much larger number of geophones, waveforms can be stacked to reduce instrument self-noise and beamforming can be used to identify wavefield azimuth and apparent velocity. Geophones can be an effective tool in ambient noise seismology down to ~7 seconds and can be used to record large seismic events effectively down to tens of seconds, well below the natural frequency of the instruments. A well-designed deployment of broadbands and geophones can enable full wavefield studies from long period to short period. Scientific and societal applications that could benefit from the improved unaliased wavefield bandwidth include local to regional seismicity, strong ground motion, magma migration, nuclear source discrimination, and crustal studies.
Master of Science
An analysis of seismic responses was performed using common seismology sensors, codeployed as part of a geologically motivated study. Broadband seismometers record seismic activity extremely well, however, due to cost and deployment effort, are less effective above ~0.1 Hz. Industry rapidly deploys many thousands of inexpensive, geophones, to record effectively above ~2 Hz; however, quality of the signal is limited below 2 Hz. In 2012, coincident seismic surveys were deployed to investigate earth structures in Idaho and Oregon. Broadband stations were deployed at every 15 km, taking experienced professionals >1 person-days per station. Fifty geophones and “Texan” seismographs at 200-m spacing were deployed per person-day by inexperienced students. Geophone data were continuously recorded for 3 nights and 1 day, while broadband seismometers were deployed for ~2 years. The seismic responses of these real deployments were compared. For a M7.7 earthquake, the broadband seismometer and geophone recorded nearly identical waveforms down to <0.03 Hz (32 s) and had similar characteristics down to 0.02 Hz (50 s). For low energy seismic signal, the waveforms were comparable down to <0.25 Hz (4 s) and had similar characteristics at ~0.15 Hz (~7 s). By deploying a much larger number of geophones, waveforms can be added together to improve signal quality and determine where the seismic source is located. Geophones can be an effective tool for low energy seismic signal down to ~7 seconds in period and can be used to record large seismic events effectively down to tens of seconds in period. A well-designed deployment of broadbands and geophones can enable full seismic studies from low and high frequencies which would have many scientific and societal benefits.
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Otero, José D. "Development and characterization of an observatory-class, broadband, non-fedback, leaf-spring interferometric seismometer." Diss., [La Jolla] : University of California, San Diego, 2009. http://wwwlib.umi.com/cr/ucsd/fullcit?p3368955.

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Thesis (Ph. D.)--University of California, San Diego, 2009.
Title from first page of PDF file (viewed September 17, 2009). Available via ProQuest Digital Dissertations. Vita. Includes bibliographical references (p. 203-206).
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Hsu, Po-Chin, and 許博欽. "Analysis Of Low Frequency Signals From Broadband Seismometers Records During Typhoons." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/37091666188715290767.

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碩士
國立中央大學
地球科學學系
104
Broadband seismometers record signals over a wide frequency band, in which the high-frequency background noise is usually associated with human activities, such as cars, trains and factory-related activities. Meanwhile, the low-frequency signals are generally linked to microseisms, atmospheric phenomena and weather conditions. By comparing the broadband seismic data recorded during the pass of the typhoons with different moving paths, such as Doksuri in 2012, Trami and Kong-Rey in 2013, Hagibis and Matmo in 2014, the meteorological information, and the marine conditions, we attempt to understand the effect of the meteorological conditions on the low-frequency noise. The result shows that the broadband station located along the southwestern coast of Taiwan usually have relatively higher background noise value, while the inland stations were characterized by lower noise energy. This rapid decay of the noise energy with distance from the coastline suggests that the low frequency noise could be correlated with the oceanic waves. In addition, the noise energy level increases when the distance from the typhoon and the station decreases. The enhanced frequency range is between 0.1-0.5 Hz, which is consistent with the effect caused by the interference of oceanic waves as suggested by the previous studies. This observation indicates that the pass of typhoon may reinforce the interaction of oceanic waves and caused some influence on the seismic records. The positive correlation between the significant wave height and the noise energy could also give evidence to this observation. However, we found that the noise energy is not necessarily the strongest when the distance from typhoon and the station is the shortest. This phenomenon seems to be related to the typhoon path. When the typhoon track is perpendicular to the coastline, the change of noise energy is generally more significantly; whereas less energy changes are observed when the typhoon path is subparallel to the coastline. On the other hand, sometimes the energy of low frequency signal could increase without the inference of typhoons. After comparing the noise energy density with different meteorological and precipitation data, we found that the pressure change and the consecutive rainfall could be the main factors which affect the energy distribution. In summary, our result confirm that the broadband seismic data could indeed be influenced by the metrological conditions and marine environments. The contribution of each effect may vary. However, the main factors which control the low frequency noise energy should still be the wave height and the pressure.
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"Development and characterization of an observatory-class, broadband, non-fedback, leaf-spring interferometric seismometer." UNIVERSITY OF CALIFORNIA, SAN DIEGO, 2010. http://pqdtopen.proquest.com/#viewpdf?dispub=3368955.

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Li, Xiao-qing 1963. "Deconvolving orbital surface waves for the source duration of large earthquakes and modeling the receiver functions for the earth structure beneath a broadband seismometer array in the Cascadia subduction zone." Thesis, 1996. http://hdl.handle.net/1957/29290.

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Roach, Lisa Aretha Nyala. "Temporal Variations in the Compliance of Gas Hydrate Formations." Thesis, 2012. http://hdl.handle.net/1807/44081.

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Seafloor compliance is a non-intrusive geophysical method sensitive to the shear modulus of the sediments below the seafloor. A compliance analysis requires the computation of the frequency dependent transfer function between the vertical stress, produced at the seafloor by the ultra low frequency passive source-infra-gravity waves, and the resulting displacement, related to velocity through the frequency. The displacement of the ocean floor is dependent on the elastic structure of the sediments and the compliance function is tuned to different depths, i.e., a change in the elastic parameters at a given depth is sensed by the compliance function at a particular frequency. In a gas hydrate system, the magnitude of the stiffness is a measure of the quantity of gas hydrates present. Gas hydrates contain immense stores of greenhouse gases making them relevant to climate change science, and represent an important potential alternative source of energy. Bullseye Vent is a gas hydrate system located in an area that has been intensively studied for over 2 decades and research results suggest that this system is evolving over time. A partnership with NEPTUNE Canada allowed for the investigation of this possible evolution. This thesis describes a compliance experiment configured for NEPTUNE Canada’s seafloor observatory and its failure. It also describes the use of 203 days of simultaneously logged pressure and velocity time-series data, measured by a Scripps differential pressure gauge, and a Güralp CMG-1T broadband seismometer on NEPTUNE Canada’s seismic station, respectively, to evaluate variations in sediment stiffness near Bullseye. The evaluation resulted in a (- 4.49 x10-3± 3.52 x 10-3) % change of the transfer function of 3rd October, 2010 and represents a 2.88% decrease in the stiffness of the sediments over the period. This thesis also outlines a new algorithm for calculating the static compliance of isotropic layered sediments.
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Books on the topic "Broadband Seismometers"

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Wiszniowski, Jan. Broadband seismic system: Effect of transfer band on detection and recording of seismic waves. Warszawa: Polish Academy of Sciences, Institute of Geophysics, 2000.

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R, Hutt Charles, and Geological Survey (U.S.), eds. Test and evaluation of the Guralp Systems CMG-3S broadband borehole deployable seismometer system. Albuquerque, N.M: U.S. Geological Survey, 1991.

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Test and evaluation of the Guralp Systems CMG-3S broadband borehole deployable seismometer system. Albuquerque, N.M: U.S. Geological Survey, 1991.

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Book chapters on the topic "Broadband Seismometers"

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Antonovskaya, Galina, Natalia Kapustian, and Irina Basakina. "New Approach of Railway Roadbed State Monitoring Using Broadband Seismometers." In Lecture Notes in Civil Engineering, 127–38. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-0450-1_13.

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Ackerley, Nick. "Principles of Broadband Seismometry." In Encyclopedia of Earthquake Engineering, 1–35. Berlin, Heidelberg: Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-642-36197-5_172-1.

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Ackerley, Nick. "Principles of Broadband Seismometry." In Encyclopedia of Earthquake Engineering, 1941–70. Berlin, Heidelberg: Springer Berlin Heidelberg, 2015. http://dx.doi.org/10.1007/978-3-642-35344-4_172.

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Fischer, Karen M., Aibing Li, Donald W. Forsyth, and Shu-Huei Hung. "Imaging three-dimensional anisotropy with broadband seismometer arrays." In Seismic Earth: Array Analysis of Broadband Seismograms, 99–116. Washington, D. C.: American Geophysical Union, 2005. http://dx.doi.org/10.1029/157gm07.

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Kanazawa, T., K. Suyehiro, N. Hirata, and M. Shinohara. "Performance of the Ocean Broadband Downhole Seismometer at Site 794." In Proceedings of the Ocean Drilling Program, 127/128 Part 2 Scientific Results. Ocean Drilling Program, 1992. http://dx.doi.org/10.2973/odp.proc.sr.127128-2.236.1992.

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Kanazawa, T., K. Suyehiro, N. Hirata, and M. Shinohara. "Performance of the Ocean Broadband Downhole Seismometer at Site 794." In Proceedings of the Ocean Drilling Program, 127/128 Scientific Results. Ocean Drilling Program, 1992. http://dx.doi.org/10.2973/odp.proc.sr.127128.236.1992.

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Suyehiro, K., T. Kanazawa, N. Hirata, M. Shinohara, and H. Kinoshita. "Broadband Downhole Digital Seismometer Experiment at Site 794: A Technical Paper." In Proceedings of the Ocean Drilling Program, 127/128 Part 2 Scientific Results. Ocean Drilling Program, 1992. http://dx.doi.org/10.2973/odp.proc.sr.127128-2.226.1992.

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Suyehiro, K., T. Kanazawa, N. Hirata, M. Shinohara, and H. Kinoshita. "Broadband Downhole Digital Seismometer Experiment at Site 794: A Technical Paper." In Proceedings of the Ocean Drilling Program, 127/128 Scientific Results. Ocean Drilling Program, 1992. http://dx.doi.org/10.2973/odp.proc.sr.127128.226.1992.

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Conference papers on the topic "Broadband Seismometers"

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Yenier*, Emrah, Michael Laporte, and Dario Baturan. "Induced-seismicity monitoring: Broadband seismometers and geophone comparison." In SEG Technical Program Expanded Abstracts 2016. Society of Exploration Geophysicists, 2016. http://dx.doi.org/10.1190/segam2016-13970947.1.

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Kumar, Abhash, Kevin Chao, Richard Hammack, William Harbert, William Ampomah, Robert Balch, and Leonard Garcia. "Surface-seismic monitoring of an active CO2-EOR operation in the Texas Panhandle using broadband seismometers." In SEG Technical Program Expanded Abstracts 2018. Society of Exploration Geophysicists, 2018. http://dx.doi.org/10.1190/segam2018-2997451.1.

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Hu, Weifei, S. C. Pryor, F. Letson, and R. J. Barthelmie. "Use of Seismic Analyses for the Wind Energy Industry." In ASME 2017 Power Conference Joint With ICOPE-17 collocated with the ASME 2017 11th International Conference on Energy Sustainability, the ASME 2017 15th International Conference on Fuel Cell Science, Engineering and Technology, and the ASME 2017 Nuclear Forum. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/power-icope2017-3538.

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This paper proposes new seismic-based methods for use in the wind energy industry with a focus on wind turbine condition monitoring. Fourteen Streckeisen STS-2 Broadband seismometers and two 3D sonic anemometers are deployed in/near an operating wind farm to collect the data used in these proof-of-principle analyses. The interquartile mean (IQM) value of power spectral density (PSD) of the seismic components in 10-minute time series are used to characterize the spectral signatures (i.e. frequencies with enhanced variance) in ground vibrations deriving from vibrations of wind turbine subassemblies. A power spectral envelope approach is taken in which the probability density function of seismic PSD is developed using seismic data collected under normal turbine operation. These power spectral envelopes clearly show the energy distribution of wind-turbine-induced ground vibrations over a wide frequency range. Singular PSD lying outside the power spectral envelopes can be easily identified, and are used herein along with SCADA data to diagnose the associated sub-optimal turbine operating conditions. Illustrative examples are given herein for periods with yaw-misalignment and excess tower acceleration. It is additionally shown that there is a strong association between drivetrain acceleration and seismic spectral power in a frequency band of 2.5–12.5 Hz. The long-term goal of the research is development of seismic-based condition monitoring (SBCM) for wind turbines. The primary advantages of SBCM are that the approach is low-cost, non-invasive and versatile (i.e., one seismic sensor monitoring for multiple turbine subassemblies).
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Guo, Meiying, Kang Wu, Jiamin Yao, Jin Qian, and Lijun Wang. "A Vertical Seismometer With Build-in Retroreflector for Absolute Gravimetry." In ASME 2018 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/imece2018-86136.

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A free-fall absolute gravimeter uses a Mach-Zehnder interferometer to track the free-falling object. Theoretically, it needs an inertial reference point, which is a reference retroreflector keeping static in inertial frame for an accurate absolute gravimetry. Practically, the reference retroreflector is always disturbed by the ground vibration. Traditionally, a vibration correction method with a broadband seismometer is used to reduce the effect of the ground vibration. The transfer function between the reference retroreflector and the seismometer is hypothesized as a proportional element with time delay. The difference between the hypothesized and the real transfer function limits the effect of the vibration correction. On this basis, a modified method, replacing the sensitive element of a seismometer with the reference retroreflector, is proposed. The motion of the reference retroreflector is measured directly by differential parallel plate capacitance detection. A closed-loop control circuit produces feedback voltage to make the reference retroreflector track the ground vibration. The feedback voltage represents the reference retroreflector’s motion directly. Experiments show the capacitance detecting circuit detects the displacement of the reference retroreflector relative to the ground with a resolution of 0.6 nm at 500 Hz. The acceleration resolution of the homemade vertical seismometer is about 10 mGal. The sensitivity of the seismometer is 316 V/g. The damp ratio of the homemade seismometer is little, and the natural frequency of the homemade seismometer is 104 Hz by analyzing the step response of the system. The bandwidth of the system is around 175 Hz. In the future, the homemade seismometer will be applied in absolute gravimeters for hostile measurement.
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5

Araya, A., K. Sekiya, and Y. Shindo. "Laser-Interferometric Broadband Seismometer for Ocean Borehole Observations." In 2007 Symposium on Underwater Technology and Workshop on Scientific Use of Submarine Cables and Related Technologies. IEEE, 2007. http://dx.doi.org/10.1109/ut.2007.370803.

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Zhang, Wentao, Wenzhu Huang, Yibo Wang, Yi Yao, Jianxiang Zhang, Bing Lv, and Fang Li. "Field Test of Broadband Fiber Optic Interferometric Seismometer." In Asia Communications and Photonics Conference. Washington, D.C.: OSA, 2020. http://dx.doi.org/10.1364/acpc.2020.m4a.88.

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Kaneda, Yoshiyuki, Katsuyoshi Kawaguchi, Eiichiro Araki, Hiroyuki Matsumoto, Takeshi Nakamura, Shinichiro Kamiya, Keisuke Ariyoshi, and Takane Hori. "Dense Ocean Floor Network for Earthquakes and Tsunamis Around the Nankai Trough Mega Thrust Earthquake Seismogenic Zone in Southwestern Japan: Real Time Monitoring of the Seismogenic Zone." In ASME 2008 27th International Conference on Offshore Mechanics and Arctic Engineering. ASMEDC, 2008. http://dx.doi.org/10.1115/omae2008-57731.

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The Nankai Trough is well known as the mega thrust earthquake generating tsunamis, with the interval of 100–150 years. The 1944 Tonankai and the 1946 Nankai earthquakes around the Nankai trough, each hypocenter was located off the Kii peninsula. Based on structural and simulation researches, we proposed and have been starting to deploy the dense ocean floor observatory network system around the Tonankai seismogenic zone, to monitor crustal activities using broadband seismometer, accelerometer and precise pressure gauges. The ocean floor network is significant ant important to monitor the crustal activities around mega-thrust earthquakes.
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Suprijanto, Tri Istiana, Hariyanto, and N. Andri Dian. "Detection of P-wave on broadband seismometer using discrete wavelet denoising." In 2013 3rd International Conference on Instrumentation Control and Automation (ICA). IEEE, 2013. http://dx.doi.org/10.1109/ica.2013.6734055.

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Shinohara, Masanao, Tomoaki Yamada, Hajime Shiobara, and Yusuke Yamashita. "Development and Evaluation of Compact Long-Term Broadband Ocean Bottom Seismometer." In 2018 OCEANS - MTS/IEEE Kobe Techno-Ocean (OTO). IEEE, 2018. http://dx.doi.org/10.1109/oceanskobe.2018.8559338.

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Lv, Shixue, Huaizhu Zhang, Jun Lin, Yun Long, and Shuai Yuan. "Remote Status Monitoring of Broadband Seismometer Based on the Mobile Internet." In 7th International Conference on Environment and Engineering Geophysics & Summit Forum of Chinese Academy of Engineering on Engineering Science and Technology. Paris, France: Atlantis Press, 2016. http://dx.doi.org/10.2991/iceeg-16.2016.121.

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Reports on the topic "Broadband Seismometers"

1

Rembold, Randy, Bion Merchant, Peter Davis, Carl Ebeling, David Wilson, Adam Ringler, and Robert Anthony. Guidelines for Broadband Seismometer Testing. Office of Scientific and Technical Information (OSTI), March 2021. http://dx.doi.org/10.2172/1773233.

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