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auxiliary source array method

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Journal Article
Journal: Geophysics
Published: 01 January 2001
Geophysics (2001) 66 (5): 1364–1371.
... of resistivity measurements with respect to formation resistivity properties. The technique, referred to as the auxiliary source array method (ASAM), generalizes the reciprocity principle-based methods in that for closely spaced receivers it may not be necessary to place a fictitious source at each receiver...
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Journal Article
Journal: Geophysics
Published: 26 February 2014
Geophysics (2014) 79 (2): KS109–KS126.
... medium ( Bouchon, 2003 ). By matching the waveforms across the two geophone arrays, we invert for the MT of each selected event. To derive the source parameters from the MT, the fracture plane has to be separated from the auxiliary plane. To address this problem and better understand how...
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Journal Article
Published: 01 April 2003
Bulletin of the Seismological Society of America (2003) 93 (2): 817–824.
... geological structures such as sedimentary basins and ridges that are some distance away from the earthquake source. We overcome the problem of multiple physical scales by subdividing the original problem into two simpler ones. The first is an auxiliary problem that simulates the earthquake source...
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Journal Article
Published: 01 April 2013
Bulletin of the Seismological Society of America (2013) 103 (2A): 759–772.
... as the ensemble of REB events of magnitudes m t in this region detected by ARCES, we have the following likelihood function ( Ringdal, 1975 ): (2) Figure 4. Illustration of Method 1 applied to the ARCES array to estimate detection threshold for the source region shown in Figure  3 . The upper...
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Journal Article
Journal: Geophysics
Published: 26 February 2016
Geophysics (2016) 81 (2): KS41–KS49.
... azimuthal coverage in the surface-based monitoring array, the joint inversion of source locations and focal mechanisms (FMs) is particularly suitable for this method. Various algorithms have been proposed to locate earthquakes. The common practice for different data sets may include one or several...
Journal Article
Published: 01 February 2000
Bulletin of the Seismological Society of America (2000) 90 (1): 151–165.
... is to narrow down the reconnaissance area, beginning with the error region for the event's epicenter, prior to using other OSI technologies. To fulfill this task the inspection team can greatly benefit from auxiliary information provided by national stations, designated in the treaty as Cooperating National...
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Journal Article
Published: 10 July 2019
Seismological Research Letters (2019) 90 (5): 1987–1993.
... and association tables openly available in the hopes that they will facilitate objective comparisons by the seismic monitoring research community of new methods and optimization techniques that lead to advances in the capacity to detect, locate, and categorize seismic sources. Although the main use envisioned...
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Journal Article
Published: 01 April 1982
Bulletin of the Seismological Society of America (1982) 72 (2): 669–670.
... of this source, it is possible to determine the epicenter with increasing precision as n ~. T h e depth of the source cannot be determined in this fashion: its estimation depends critically on auxiliary assumptions concerning earth structure. PROOF The following proof is restricted to the case of seismic sources...
Journal Article
Journal: Geophysics
Published: 11 November 2016
Geophysics (2017) 82 (1): KS1–KS11.
...Wenhuan Kuang; Mark Zoback; Jie Zhang ABSTRACT We extend a full-waveform modeling method to invert source focal-plane mechanisms for microseismic data recorded with dual-borehole seismic arrays. Combining inverted focal-plane mechanisms with geomechanics knowledge, we map the pore pressure...
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Journal Article
Journal: Geophysics
Published: 01 January 2000
Geophysics (2000) 65 (6): 1733–1745.
.... To focus the discussion on a practical geophysical inverse problem, let us consider the example described in Figure 1 : An array of five dc electric current sources is deployed at 10-m spacings along the borehole indicated on the left side of the diagram. These sources are used to generate a spatial...
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Journal Article
Published: 01 December 2001
Bulletin of the Seismological Society of America (2001) 91 (6): 1831–1850.
..., Canada 63.7467 -68.5467 3C auxiliary 6 ILAR Eielson Array, Alaska 64.7714 -146.8866 array primary 7 INK Inuvik, Canada 68.3067 -133.5200 3C auxiliary 8 KDAK Kodiak Island, Alaska, USA 57.7828 -152.5835 3C auxiliary 9 MBC Mould Bay, Canada 76.2420 -119.3600 3C...
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Journal Article
Published: 01 August 1999