Results 191 to 200 of about 9,434 (223)

Coseismic and postseismic slip of the 2011 magnitude-9 Tohoku-Oki earthquake

Nature, 2011
Most 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, Takuya, Nishimura, Hisashi, Suito, Tomokazu, Kobayashi, Mikio, Tobita, Tetsuro, Imakiire   +5 more
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Coseismic Slip Gradient and Rupture Jumps on Parallel Strike‐Slip Faults

Bulletin of the Seismological Society of America, 2015
Abstract Field observations of slip distribution along large strike‐slip faults and preliminary rupture model simulations reveal a possible correlation between slip gradient near a fault end and the ability of a rupture to jump over a structure stepover in a strike‐slip fault system.
Zaifeng Liu, Benchun Duan
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Fracture energy and breakdown work scaling with coseismic slip

2023
Geological observations reveal that earthquakes nucleate, propagate, and arrest in complex fault zones whose structural heterogeneity depends on the tectonic loading, geometry, lithology, rheology, presence of fluids, and strain localization processes. These fault zones can host a wide range of fault slip behaviors (e.g., creep, aseismic- and slow-slip
Elisa Tinti, Massimo Cocco, Stefano Aretusini, Chiara Cornelio, Stefan B. Nielsen, Elena Spagnuolo, Paul Selvadurai, Giulio Di Toro   +7 more
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Coseismic recrystallization during shallow earthquake slip

Geology, 2013
Solidified frictional melts, or pseudotachylytes, remain the only unambiguous indicator of seismic slip in the geological record. However, pseudotachylytes form at >5 km depth, and there are many rock types in which they do not form at all. We performed low- to high-velocity rock friction experiments designed to impose realistic coseismic slip pulses ...
Smith, S.A.F., Di Toro G., Kim, S., Ree, J.-H., Nielsen, S., Billi, A., Spiess, R.   +12 more
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Regularized inversion for coseismic slip distribution with active constraint balancing

Journal of Central South University, 2017
Estimating 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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Mining-induced fault failure and coseismic slip based on numerical investigation

Bulletin of Engineering Geology and the Environment
Yatao Li, Eiichi Fukuyama, Nana Yoshimitsu   +2 more
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Precursory and coseismic water-pressure variations in stick-slip experiments

Geology, 1976
We 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, R. E. Goodman, Chi-Yuen Wang   +2 more
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Determination of parameters characteristic of dynamic weakening mechanisms during coseismic slip

2022
<p>While sliding at seismic slip-rates of ca. 1 m/s, a natural fault undergoes an abrupt decrease of its strength called enhanced dynamic weakening. Asperity-scale (<< mm) processes related to flash heating & weakening and meso-scale (mm-cm) processes involving shear across the bulk slipping zone related to ...
Chiara Cornelio, Elena Spagnuolo, Stefan Nielsen, Stefano Aretusini, Francois Passelègue, Marie Violay, Massimo Cocco, Giulio Di Toro   +7 more
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Inversion of coseismic stress-triggered fault slips using borehole strainmeter observations

Acta Seismologica Sinica, 2006
Coseismic stress-triggering is becoming a new hot spot of research. Coseismic strain steps recorded by borehole strainmeters are particularly valuable in studying coseismic stress-triggered fault slips. Based on the theory of dislocation, one can invert the triggered fault slips with such data if he/she has a well understanding about the local faults ...
Ze-hua Qiu, Bao-xiang Kan, Lei Tang, Chao-fan Zhang, Mo Song   +4 more
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