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Automated fault model discretization for inversions for coseismic slip distributions [PDF]
Journal of Geophysical Research, 2010 Geoscientists increasingly rely on coseismic slip distributions inferred from geodetic observations to drive sophisticated models of the seismic cycle. To date, little work has been done on optimizing the parameterization of these fault models so that they reflect the resolving power of observed surface displacements.
Rowena Lohman
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Coseismic and postseismic slip of the 2011 magnitude-9 Tohoku-Oki earthquake
Nature, 2011Most large earthquakes occur along an oceanic trench, where an oceanic plate subducts beneath a continental plate. Massive earthquakes with a moment magnitude, M(w), of nine have been known to occur in only a few areas, including Chile, Alaska, Kamchatka and Sumatra. No historical records exist of a M(w) = 9 earthquake along the Japan trench, where the
Shinzaburo, Ozawa +5 more
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Brushlines in fault pseudotachylytes: A new criterion for coseismic slip direction
Geology, 2016Striations along fault planes, such as slickensides, generally indicate slip direction. These linear structures typically form through friction between two solids. Here we describe brushlines, a new class of fault striation in pseudotachylytes, formed during coseismic slip at the interface between host rock and frictional melt.
Eric C. Ferré +5 more
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Precursory and coseismic water-pressure variations in stick-slip experiments
Geology, 1976We have measured changes in water pressure as a function of shear displacement and time during undrained direct shear of flat joint surfaces in saturated quartz monzonite. During the postpeak shear behavior, the water pressure generally decreases, probably owing to opening of new cracks and enlarging of some of the existing cracks and pores.
P. N. Sundaram +2 more
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Regularized inversion for coseismic slip distribution with active constraint balancing
Journal of Central South University, 2017Estimating the spatial distribution of coseismic slip is an ill-posed inverse problem, and solutions may be extremely oscillatory due to measurement errors without any constraints on the coseismic slip distribution. In order to obtain stable solution for coseismic slip inversion, regularization method with smoothness-constrained was imposed.
Xiao-zhong Tong, Wei Xie, Da-wei Gao
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Coseismic Slip in the 1964 Prince William Sound Earthquake: A New Geodetic Inversion
pure and applied geophysics, 1994The 1964 Prince William Sound earthquake (March 28, 1964; M w = 9.2) caused crustal deformation over an area of approximately 140,000 km2 in south central Alaska. In this study geodetic and geologic measurements of this surface deformation were inverted for the slip distribution on the 1964 rupture surface.
Sandford R. Holdahl, Jeanne Sauber
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Large Coseismic Slip to the Trench During the 2011 Tohoku-Oki Earthquake
Annual Review of Earth and Planetary Sciences, 2020The strong ground motions, large crustal deformation, and tsunami generated by the 2011 Tohoku-oki earthquake ( Mw 9.1) reveal that a large coseismic slip likely propagated to shallow depth in the Japan Trench. Although data acquired by onshore networks cannot resolve the slip behavior of the updip fault rupture, marine geophysical and geological ...
Shuichi Kodaira +4 more
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A priori error estimates for a coseismic slip optimal control problem
Applied Numerical MathematicszbMATH Open Web Interface contents unavailable due to conflicting licenses.
Jorge Aguayo, Rodolfo Araya
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Coseismic slip on shallow décollement megathrusts: implications for seismic and tsunami hazard
Earth-Science Reviews, 2015Abstract For years, many studies of subduction zones and on-land fold-and-thrust belts have assumed that the frontal portions of accretionary prisms are too weak to rupture coseismically and must therefore be fully creeping. We present a series of examples, both on-land and offshore, demonstrating that in many cases, shallow decollements are capable ...
Judith Hubbard +3 more
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Probabilistic Estimates of Surface Coseismic Slip and Afterslip for Hayward Fault Earthquakes
Bulletin of the Seismological Society of America, 2012We examine the partition of long‐term geologic slip on the Hayward fault into interseismic creep, coseismic slip, and afterslip. Using Monte Carlo simulations, we compute expected coseismic slip and afterslip at three alinement array sites for Hayward fault earthquakes with nominal moment magnitudes ranging from about 6.5 to 7.1.
B. T. Aagaard +2 more
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