Results 11 to 20 of about 1,055,211 (305)
Microseismic moment-tensor inversion
, 2011 It is common practice in the oil and gas industry to use a single vertical well with limited number of geophones to monitor the microseismicity induced by hydraulic fracture treatment. In this thesis, I have employed a synthetic and stochastic modeling approach to investigate the effects of monitoring geometry and noise on inverting recorded P- and S ...
Forouhideh, Farshid
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Moment-SOS relaxations for moment and tensor recovery problems
Numerical Algebra, Control and OptimizationThis paper studies moment and tensor recovery problems whose decomposing vectors are contained in some given semialgebraic sets. We propose Moment-SOS relaxations with generic objectives for recovering moments and tensors, whose decomposition lengths are expected to be low.
Huang, Lei, Nie, Jiawang, Wang, Jiajia
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Geoscience Letters, 2021 We investigate the local seismotectonic of the Molucca Sea area using moment tensor calculations for the earthquakes that occurred in July 2019 at a depth of 10–55 km.
Aditya Dwi Prasetio +6 more
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On the convergence of the combination technique [PDF]
, 2013 Sparse tensor product spaces provide an efficient tool todiscretize higher dimensional operator equations. The direct Galerkin method in such ansatz spaces may employ hierarchical bases, interpolets, wavelets or multilevel frames. Besides, an alternative
Griebel, Michael +3 more
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Frontiers in Earth Science, 2021 Underground exploitation of georesources can be highly correlated with induced seismic activity. In order to reduce the risk and improve the mining operations safety, the mining activity is monitored by a dedicated seismic network.
Alicja Caputa +2 more
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Analytical models of volcanic ellipsoidal expansion sources
Annals of Geophysics, 2013 Modeling non-double-couple earthquakes and surficial deformation in volcanic and geothermal areas usually involves expansion sources. Given an ensemble of ellipsoidal or tensile expansion sources and double-couple ones, it is straightforward to obtain ...
Antonella Amoruso, Luca Crescentini
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On the documentation, independence, and stability of widely used seismological data products
Frontiers in Earth Science, 2022 Earthquake scientists have traditionally relied on relatively small data sets recorded on small numbers of instruments. With advances in both instrumentation and computational resources, the big-data era, including an established norm of open data ...
Boris Rösler +3 more
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Varying Coefficient Tensor Models for Brain Imaging [PDF]
, 2005 We revisit a multidimensional varying-coefficient model (VCM), by allowing regressor coefficients to vary smoothly in more than one dimension, thereby extending the VCM of Hastie and Tibshirani.
Marx, Brian D. +2 more
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Annals of Geophysics, 2008 The seismic sequence that hit Umbria and Marche during 1997 and 1998 was particularly significant because it dramatically marked the evolution of analysis tools and the development of our geophysical knowledge of the region. Since September 1997, we have
A. Morelli, S. Pondrelli
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The robustness of seismic moment and magnitudes estimated using spectral analysis [PDF]
, 2014 calculate seismic moment. This is an important topic for operators and regulators who require good magnitude estimates when monitoring induced seismicity.
Verdon, James P +5 more
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