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seismic gradiometry

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Journal Article
Published: 30 September 2022
Bulletin of the Seismological Society of America (2022) 112 (6): 3141–3150.
... of Mining and Technology . Langston C. A. ( 2007 a). Spatial gradient analysis for linear seismic arrays , Bull. Seismol. Soc. Am. 97 , no.  1B , 265 – 280 . Langston C. A. ( 2007 b). Wave gradiometry in the time domain , Bull. Seismol. Soc. Am. 97 , no.  3 , 926 – 933...
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Journal Article
Published: 06 April 2021
Bulletin of the Seismological Society of America (2021) 111 (3): 1365–1377.
... speed, and wave direction. In this article, we approach the discrimination problem with a different paradigm in mind. Specifically, we combine seismic gradiometry with a well‐established machine learning methodology, termed spectral filtering, to develop a data‐driven event classification scheme...
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Journal Article
Journal: Geophysics
Published: 22 November 2019
Geophysics (2020) 85 (1): KS13–KS27.
... results in near real time. We have developed a sequence of fast seismic acquisition for dispersion curve extraction and inversion for 3D seismic models, based on wavefield gradiometry, wave equation inversion, and machine-learning technology. The seismic array method that we use is Helmholtz wave equation...
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Journal Article
Published: 01 August 2013
Bulletin of the Seismological Society of America (2013) 103 (4): 2161–2172.
...Christian Poppeliers; Predrag Punoševac Abstract We expand the theoretical development of seismic‐wave gradiometry to 3D using the polarized wavefield. First, we develop a map that relates the Cartesian spatial derivatives to the spatial derivatives in spherical coordinates. We then develop a set...
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Journal Article
Published: 06 October 2015
Bulletin of the Seismological Society of America (2015) 105 (6): 3143–3155.
...Christian Poppeliers; Elizabeth V. Evans Abstract In seismic-wave gradiometry, the spatial gradient and the time derivative of the measured wavefield are used to estimate the slowness vector and changes in the radiation pattern. When using a seismic array to estimate the seismic spatial derivatives...
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Journal Article
Published: 01 August 2013
Bulletin of the Seismological Society of America (2013) 103 (4): 2151–2160.
... seismic studies to only a few meters for local seismic studies ( Langston et al. , 2006 ; Langston, 2007a , b , c ; Langston and Liang, 2008 ; Liang and Langston, 2009 ; Poppeliers, 2010 , 2011 ). This type of phased array processing, referred to as seismic gradiometry or seismic gradiometric...
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Journal Article
Published: 01 June 2010
Bulletin of the Seismological Society of America (2010) 100 (3): 1211–1224.
...Christian Poppeliers Abstract This article describes a new development in seismic wave gradiometry. The work follows previous work on time-domain wave gradiometry but proposes applying a wavelet transform to the data prior to wave gradiometric analysis. The result is a more complete picture of wave...
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Journal Article
Published: 10 August 2016
Seismological Research Letters (2016) 87 (5): 1091–1103.
... and refraction studies, wave gradiometry can provide additional information about the wavefield and the array configuration takes up considerably less surface area while sampling the same wave frequencies as beamforming arrays. Seismic‐wave gradiometry uses wave displacement observations from a 2D array...
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Journal Article
Journal: Geophysics
Published: 12 April 2016
Geophysics (2016) 81 (3): D233–D243.
...Charles A. Langston; Mehari Melak Ayele ABSTRACT We have developed vertical seismic wave gradiometry (VSWG) to estimate velocity, impedance, and attenuation structure in the vicinity of boreholes using borehole array waveforms of check-shot explosions near the borehole head. We have extended wave...
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Journal Article
Journal: Interpretation
Published: 20 May 2014
Interpretation (2014) 2 (3): SH33–SH53.
... [CSEM]) and gravity gradiometry surveys colocated with wide azimuth seismic. Three-dimensional inversion of MT and CSEM is performed first with minimal a priori constraints and then by including variable amounts of interpretation in the starting models. The internal variations in the evaporitic...
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Journal Article
Published: 01 October 2011
Bulletin of the Seismological Society of America (2011) 101 (5): 2108–2121.
...Christian Poppeliers Abstract A new technique to determine uncertainty estimates for wave parameters obtained by seismic-wave gradiometry is established using the multiwavelet transform. Wave gradiometry uses spatial gradients as measured by a small-scale seismic array to estimate the wave...
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Journal Article
Published: 01 May 2009
Bulletin of the Seismological Society of America (2009) 99 (2B): 1287–1301.
... ) using recently developed techniques of seismic-wave gradiometry in addition to computing geodetic strain and rotation ( Langston, 2007a , b , c ; Langston and Liang, 2008 ). Seismic-wave gradiometry is a technique that utilizes the wave spatial gradients (strains and rotations) and wave particle...
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Image
Analysis of the Apollo 17 active-<span class="search-highlight">seismic</span> data with <span class="search-highlight">seismic</span> <span class="search-highlight">gradiometry</span> tool...
Published: 27 April 2018
Figure 9. Analysis of the Apollo 17 active-seismic data with seismic gradiometry tools. (a) Example traces from two explosives sources EP-3 and EP-5 recorded by the central geophone of the star-like geophone array. The source-receiver offset is given on the left. Note that the raw traces
Journal Article
Published: 02 October 2018
Bulletin of the Seismological Society of America (2018) 108 (6): 3562–3575.
...A. T. Ringler; R. E. Anthony; A. A. Holland; D. C. Wilson; C.‐J. Lin Abstract Characterizing rotational motions from earthquakes at local distances has the potential to improve earthquake engineering and seismic gradiometry by better characterizing the complete seismic wavefield. Applied Technology...
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Journal Article
Published: 23 December 2022
Seismological Research Letters (2023) 94 (2A): 626–636.
... . Liang C. , and Langston C. A. 2009 . Wave gradiometry for USArray: Rayleigh waves , J. Geophys. Res. 114 , no.  B2 , doi: 10.1029/2008JB005918 . Ling O. K. A. Stähler S. C. , and Giardini D. 2021 . Visualizing global seismic phases with AlpArray , Seismol. Res. Lett...
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Journal Article
Journal: Geophysics
Published: 10 February 2015
Geophysics (2015) 80 (2): WA99–WA111.
... gravimetry and gravity gradiometry. Even though time-lapse seismic has historically shown great success for SAGD monitoring, the gravimetry and gravity gradiometry methods offer a low-cost interseismic alternative that can complement the seismic method, increase the survey frequency, and decrease the cost...
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Journal Article
Published: 03 February 2021
Seismological Research Letters (2021) 92 (3): 2015–2027.
...Takahiro Shiina; Takuto Maeda; Masayuki Kano; Aitaro Kato; Naoshi Hirata Abstract We propose an optimization method for applying the seismic‐wave gradiometry (SWG) method to a dense seismic station network consisting of nonuniformly distributed seismographs. As a nonuniformly distributed station...
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Journal Article
Journal: Geophysics
Published: 20 July 2021
Geophysics (2021) 86 (4): G35–G53.
.... (2001) use a pseudoannealing method for the joint inversion of gravity and gravity gradiometry data and Colombo and De Stefano (2007) combine gravity, seismic, and magnetotulleric data. Sun and Li (2013 , 2016 ) develop a guided FCM clustering inversion to jointly invert gravity and seismic...
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Image
Location of the three areas where coincident WAZ <span class="search-highlight">seismic</span>, MT&#x2F;CSEM, and grav...
Published: 18 July 2018
Figure 2. Location of the three areas where coincident WAZ seismic, MT/CSEM, and gravity gradiometry data were acquired.
Series: Society of Exploration Geophysicists Geophysical References Series
Published: 01 January 1998
EISBN: 9781560801832
... Abstract The first test of the Bell Aerospace gravity Gradiometry Survey System (GSS) for geologic applications was conducted in April 1994 in collaboration with the U.S. Navy. The GSS is a recently declassified gravity sensing system that contains the world's only moving-base gravity...