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pro vyhledávání: '"Helmstetter, Agnes"'
Autor:
Gimbert, Florent, Nanni, Ugo, Roux, Philippe, Helmstetter, Agnés, Garambois, Stéphane, Lecointre, Albanne, Walpersdorf, Andrea, Jourdain, Bruno, Langlais, Mickael, Larman, Olivier, Lindner, Fabian, Sergeant, Amandine, Vincent, Christian, Walter, Fabian
Recent work in the field of cryo-seismology demonstrates that high frequency (>1 Hz) waves provide key constraints on a wide range of glacier processes such as basal friction, surface crevassing or subglacial water flow. Establishing quantitative lin
Externí odkaz:
http://arxiv.org/abs/2009.06321
Akademický článek
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Akademický článek
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Publikováno v:
In Structural Safety May 2020 84
Autor:
Helmstetter, Agnes, Shaw, Bruce E.
We study how a stress perturbation generated by a mainshock affects a population of faults obeying a rate-state friction law. Depending on the model parameters and on the initial state, the fault exhibits aftershocks, slow earthquakes, or decaying af
Externí odkaz:
http://arxiv.org/abs/physics/0703249
Autor:
Helmstetter, Agnes, Shaw, Bruce E.
Publikováno v:
J. Geophys. Res., 111, B07304, doi:10.1029/2005JB004077 (2006)
We estimate the rate of aftershocks triggered by a heterogeneous stress change, using the rate-and-state model of Dieterich [1994].We show that an exponential stress distribution Pt(au) ~exp(-tautau_0) gives an Omori law decay of aftershocks with tim
Externí odkaz:
http://arxiv.org/abs/physics/0509252
Autor:
Helmstetter, Agnes, Sornette, Didier
Publikováno v:
Phys. Rev. Lett. Lett. 92, 129801 (2004)
Mega et al.(cond-mat/0212529) proposed to use the ``diffusion entropy'' (DE) method to demonstrate that the distribution of time intervals between a large earthquake (the mainshock of a given seismic sequence) and the next one does not obey Poisson s
Externí odkaz:
http://arxiv.org/abs/physics/0307134
Autor:
Helmstetter, Agnes, Sornette, Didier
Publikováno v:
Geophys. Res. Lett., 30, 2069, 10.1029/2003GL018186 (2003)
The empirical Bath's law states that the average difference in magnitude between a mainshock and its largest aftershock is 1.2, regardless of the mainshock magnitude. Following Vere-Jones [1969] and Console et al. [2003], we show that the origin of B
Externí odkaz:
http://arxiv.org/abs/physics/0307083
Publikováno v:
J. Geophys. Res., 108, 2483, 10.1029/2003JB002503, 2003
We analyze 21 aftershock sequences of California to test for evidence of space-time diffusion. Aftershock diffusion may result from stress diffusion and is also predicted by any mechanism of stress weakening. Here, we test an alternative mechanism to
Externí odkaz:
http://arxiv.org/abs/physics/0303075
Autor:
Helmstetter, Agnes, Sornette, Didier
Publikováno v:
Geophys. Res. Lett., 30, 1576, doi:1029/2003GL017670, 2003
Using the simple ETAS branching model of seismicity, which assumes that each earthquake can trigger other earthquakes, we quantify the role played by the cascade of triggered seismicity in controlling the rate of aftershock decay as well as the overa
Externí odkaz:
http://arxiv.org/abs/physics/0303070