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infrasonic methods

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Comparison between (a) vertical seismograms at six seismic stations (open t...
Published: 14 December 2022
by the Formosa array at a time window of 1500 s marked in yellow by employing broadband frequency–wavenumber method (BBFK) analyses; and (d) the dominant frequency of ∼0.0117 Hz obtained from data recorded by one infrasonic sensor using the fast Fourier transform (FFT) process.
Journal Article
Published: 01 September 2014
Seismological Research Letters (2014) 85 (5): 1056–1062.
... with seismic data ( Ichihara et al. , 2012 ) constitutes a perfectly feasible way to distinguish and enhance infrasonic signals of possible volcanic origin in a time series affected by wind noise. We have presented an original method for highlighting and separating an infrasonic component of possible...
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Journal Article
Published: 02 October 2023
The Seismic Record (2023) 3 (4): 249–258.
... and local coupling effects. The TCM method adds to a growing suite of analysis methods for seismoacoustic data by providing an alternative approach to compute the back‐azimuth of an infrasonic wave that is recorded on an infrasound microphone and a seismometer. The resulting back‐azimuth estimates...
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Journal Article
Published: 01 October 2009
Bulletin of the Seismological Society of America (2009) 99 (5): 3055–3066.
... using well established infrasonic methods ( Edwards et al. , 2006 ). Here we report the results of ∼2 yr of monitoring for meteor-related acoustic–seismic coupling (24 January 2006–31 December 2007) at a collocated infrasound-seismic array in southwestern Ontario, Canada. Our detections...
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Journal Article
Published: 14 December 2022
Seismological Research Letters (2023) 94 (2A): 617–625.
... by the Formosa array at a time window of 1500 s marked in yellow by employing broadband frequency–wavenumber method (BBFK) analyses; and (d) the dominant frequency of ∼0.0117 Hz obtained from data recorded by one infrasonic sensor using the fast Fourier transform (FFT) process. ...
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Journal Article
Published: 22 August 2018
Seismological Research Letters (2018) 89 (6): 2183–2192.
.... method , Geophys. Res. Lett. 22 , no.  9 , 1021 – 1024 , doi: 10.1029/95GL00468 . Clauter D. A. , and Blandford R. R. 1998 . Capability modeling of the proposed international monitoring system 60‐station infrasonic network , Tech. Rept. LAUR‐98‐56 , Los Alamos National Labs...
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Journal Article
Published: 15 October 2014
Seismological Research Letters (2014) 85 (6): 1200–1211.
... source location method in volcano acoustics at local distances (e.g., <10  km) is semblance, a forward grid‐search technique modified for volcano seismic signals by Kawakatsu et al. (2000) and Almendros and Chouet (2003) . Other techniques for source location include Bayesian infrasonic source...
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Journal Article
Published: 02 June 2023
Bulletin of the Seismological Society of America (2023) 113 (4): 1493–1512.
... of the Source Physics Experiments [SPE] from 2014 to 2020) to detect both seismic and infrasonic signals from earthquakes at local ranges (<50 km). Methods used include a combination of spectral analysis and automated array processing, supported by U.S. Geological Survey earthquake bulletins...
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Journal Article
Published: 15 October 2014
Seismological Research Letters (2014) 85 (6): 1151–1162.
... material associated with the Sakurajima explosions. Kim and Lees (2014) use novel graphical processing unit‐based finite difference time domain processing to investigate 3D infrasound propagation and source localization. McKee et al. (2014) test the network semblance method on acoustic source...
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Journal Article
Published: 26 June 2018
Bulletin of the Seismological Society of America (2018) 108 (4): 2032–2045.
...Catherine D. de Groot‐Hedlin; Michael A. H. Hedlin Abstract The Automated Event Location Using a Mesh of Arrays (AELUMA) method, originally developed for detection of atmospheric sources using infrasonic data, is modified here to detect and locate seismic events. A key feature of AELUMA...
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Journal Article
Published: 01 September 2014
Seismological Research Letters (2014) 85 (5): 1012–1018.
..., 1987 ), theoretical and empirical methods based on the observed acoustic records must be relied upon to estimate the object’s size. Two methods can be applied, one using near‐field observations of the ballistic shock and second far field using the more distant infrasonic observations of the object’s...
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Journal Article
Published: 26 December 2018
Bulletin of the Seismological Society of America (2019) 109 (1): 463–475.
... significant Rayleigh waves. In addition to the direct conversion of P ‐wave energy to acoustic energy, the propagation of surface waves will also generate an infrasonic signal ( Artru et al. , 2004 ; Mutschlecner and Whitaker, 2005 ). However, our method of modeling the acoustic Green’s functions does...
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Journal Article
Published: 08 January 2020
Seismological Research Letters (2020) 91 (2A): 921–929.
... will be referred to as an “event.” Common methods from seismology, such as waveform cross correlation and template matching, work poorly for infrasound signal classification because infrasonic waveforms are so strongly affected by the atmospheric regime through which they travel. Bowman and Albert (2018...
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Journal Article
Published: 15 June 2022
Bulletin of the Seismological Society of America (2022) 112 (4): 2216–2230.
..., and then corroborate these results by comparing the infrasonic data predicted via the RI for both the cases. The method we use here is based on that described in Poppeliers et al. (2019 , 2020) , but is also briefly summarized here for clarity. The linear model we use predicts time‐dependent seismoacoustic...
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Journal Article
Published: 11 March 2015
Seismological Research Letters (2015) 86 (3): 917–928.
... at very low thresholds was challenging due to the detection of vast numbers of industrial blasts. A significant effort has been invested in methods for identifying seismic signals from such legitimate sources so that each such event can be (semi‐)automatically ascribed to a known source with high...
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Journal Article
Published: 20 April 2023
Bulletin of the Seismological Society of America (2023) 113 (4): 1682–1691.
... will provide a valuable, benchmark resource to develop signal processing algorithms and explosion monitoring methods against manual, human observations. * Corresponding author: rodd2@llnl.gov 31 October 2022 © Seismological Society of America KEY POINTS There are limited available...
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Journal Article
Published: 09 February 2023
Bulletin of the Seismological Society of America (2023) 113 (4): 1513–1522.
... underground nuclear tests , Geophys. Res. Lett. 43 , no.  2 , 3526 – 3533 , doi: 10.1002/2016GL068497 . Blom P. , and Waxler R. 2017 . Modeling and observations of an elevated, moving infrasonic source: Eigenray methods , J. Acoust. Soc. Am. 141 , no.  4 , 2681 – 2692 , doi...
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Journal Article
Published: 23 March 2016
Seismological Research Letters (2016) 87 (3): 678–684.
... infrasonic signal (Fig.  1b ). The seismic wave took approximately 40 s to propagate 294 km from the epicenter to the array, with a mean propagation velocity of 7.3  km/s, consistent with the Moho‐discontinuity refracted P ‐wave arrival. © 2016 by the Seismological Society of America Earthquakes...
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Journal Article
Published: 01 February 2009
Bulletin of the Seismological Society of America (2009) 99 (1): 449–453.
... for colocated seismic and infrasonic data, and assesses detector performance through comparison with analyst picks. We assess the adaptive detector by generating receiver-operating characteristic ( ROC ) curves, illustrating the trade-off between detection probability and false-alarm probability, and comparing...
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Journal Article
Published: 01 July 2010
Seismological Research Letters (2010) 81 (4): 614–624.
... tool because the time interval between the shots is similar no matter where the observations are. Therefore if signals spaced at the right interval are observed, they are likely to be from New Bomb if the azimuth is also correct. Field experiments to investigate the propagation of infrasonic waves...
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