Results 141 to 150 of about 3,073,887 (172)
Bayesian analysis of the modified Omori law [PDF]
Journal of Geophysical Research, 2012 In order to examine variations in aftershock decay rate, we propose a Bayesian framework to estimate the {K, c, p}‐values of the modified Omori law (MOL), λ(t) = K(c + t)−p. The Bayesian setting allows not only to produce a point estimator of these three parameters but also to assess their uncertainties and posterior dependencies with respect to the ...
Matthias Holschneider +2 more
exaly +5 more sources
Omori law for eruption foreshocks and aftershocks [PDF]
Journal of Geophysical Research, 2012 Using the 1973–2009 worldwide catalogs forM≥ 4.8 seismicity andVEI≥ 0 volcano eruptions, we compare the properties of seismic damage patterns contemporary with eruption with the properties of foreshocks and aftershocks of classic tectonic earthquakes. Using superposed epoch analysis, we demonstrated that the seismicity rate after eruption decreases as ...
Jean-Robert Grasso
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Magnitude-dependent Omori law: Theory and empirical study [PDF]
Journal of Geophysical Research, 2005 We propose a new physically-based ``multifractal stress activation'' model of earthquake interaction and triggering based on two simple ingredients: (i) a seismic rupture results from activated processes giving an exponential dependence on the local ...
G Ouillon, Didier Sornette
exaly +7 more sources
Dynamical scaling and generalized Omori law [PDF]
Geophysical Research Letters, 2007 The power law decay of the aftershocks rate is observed only after a characteristic time scale c. The dependence of c on the mainshock magnitude MM and on the lower cut‐off magnitude MI is well established. By considering ten sequences recorded in the California Catalog we show that the aftershock number distribution becomes independent of both MM and ...
Eugenio Lippiello, L De Arcangelis
exaly +4 more sources
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The Omori Law: The 150-Year Birthday Jubilee of Fusakichi Omori
Journal of Volcanology and Seismology, 2018The outstanding Japanese seismologist Fusakichi Omori was born 150 years ago, on October 30, 1868. He discovered his first law in earthquake physics that now bears his name when he was 26. Essentially, Omori’s law tells us that the decay of aftershock rate follows a hyperbolic law.
A. Guglielmi, A. Zavyalov
semanticscholar +2 more sources
Omori law for foreshocks and aftershocks in a realistic earthquake model
EPL (Europhysics Letters), 2019We study a physical model for earthquakes which extends the standard spring-block model. It is able to quantitatively describe the observations which detect differences between the statistics of foreshocks and aftershocks and the properties of main ...
O. Braun, M. Peyrard
semanticscholar +2 more sources
Bayesian estimation of the Modified Omori Law parameters for the Iranian Plateau
Journal of Seismology, 2016The forecasting of large aftershocks is a preliminary and critical step in seismic hazard analysis and seismic risk management. From a statistical point of view, it relies entirely on the estimation of the properties of aftershock sequences using a set of laws with well-defined parameters.
Hamid Zafarani +2 more
exaly +3 more sources
Omori’s law: a note on the history of geophysics
Physics-Uspekhi, 2017Abstract In the late nineteenth century, the Japanese seismologist Omori discovered the first law of earthquake physics, which states that the rate of aftershocks decreases hyperbolically with time. Over the years since then, there has been a vast amount of literature on this law, and the significance of its discovery has been ...
A V Guglielmi
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The Generalized Omori Law:. Magnitude Incompleteness or Magnitude Clustering
International Journal of Modern Physics B, 2009The investigate the aftershock decay soon after the largest ten sequences occurred in Southern California in last 20 years. We show that this decay becomes independent on the mainshock magnitude MMand on the lower magnitude threshold MIif time is rescaled by an appropriate time scale fixed by the difference MM– MI.
M. Bottiglieri +3 more
semanticscholar +3 more sources
Bulk-friction modeling of afterslip and the modified Omori law
Tectonophysics, 1997Abstract Afterslip data from the Superstition Hills fault in southern California, a creep event on the same fault, the modified Omori law, and cumulative moments from aftershocks of the 1957 Aleutian Islands earthquake all indicate that the original formulation by Dieterich (1981) [Constitutive properties of faults with simulated gouge. AGU, Geophys.
L. Wennerberg, R. V. Sharp
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