The Frequency-Domain Moment-Tensor Inversion: Retrieving the Complete Source Moment-Tensor Spectra and Time Histories

Yang, Xiaoning; Stump, Brian W.; MacPhail, M. D.

doi:10.1007/978-3-319-77359-9_3

Moment Tensor Solutions

2018

DOI: 10.1007/978-3-319-77359-9_3

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The Frequency-Domain Moment-Tensor Inversion: Retrieving the Complete Source Moment-Tensor Spectra and Time Histories

Xiaoning Yang

Brian W. Stump

M. D. MacPhail

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2023

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Time-Varying Moment-Tensor Analysis with Application to Buried Chemical Explosions

Kintner,

Michael Cleveland,

Eric Pippin

et al. 2023

Seismological Research Letters

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The Source Physics Experiment (SPE) Phase I consisted of a series of over-buried, horizontally colocated chemical explosions at the Nevada National Security Site. Seismic waveforms from these explosions recorded at near-source accelerometers, local geophone arrays, and regional seismic stations provided a rich suite of observations suitable for resolving fine source details. To investigate the time-varying source history of the explosions, we used the frequency-domain moment-tensor inversion method described in Yang et al. (2018) with added regularization and reconstruction to suppress the nonuniqueness evident in unconstrained inversion results. The inverted moment-rate spectra are accurate within the response band of the local geophones and, in all cases, display predominately isotropic characteristics. For SPE-4Prime, SPE-5, and SPE-6, we resolve predominately isotropic moment release followed by double couple and compensated linear vector dipole (CLVD) release later in the time-varying source history. We interpret these results both in terms of absolute depth and scaled depth of burial. The apparent non-isotropic release from SPE-4Prime and SPE-5 may simply reflect increased resolving power related to improved Earth model accuracy at greater absolute depths, whereas the non-isotropic release from SPE-6 likely reflects the larger damage associated with an event at a shallower scaled depth. These results provide insight into the time-varying source characteristics of shallow explosions and motivation to study shear-wave generation by inverting for fracture, spallation, induced slip, and other temporally delayed source processes through time-varying methods.

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Time-Varying Moment-Tensor Analysis with Application to Buried Chemical Explosions

Kintner,

Michael Cleveland,

Eric Pippin

et al. 2023

Seismological Research Letters

View full text Add to dashboard Cite

show abstract

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The Frequency-Domain Moment-Tensor Inversion: Retrieving the Complete Source Moment-Tensor Spectra and Time Histories

Cited by 1 publication

References 11 publications

Time-Varying Moment-Tensor Analysis with Application to Buried Chemical Explosions

Time-Varying Moment-Tensor Analysis with Application to Buried Chemical Explosions

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