Results 21 to 30 of about 74,393 (284)

Seismicity and Principal Seismic Effects [PDF]

Geophysical Journal International, 1970
Summary A statistical method is given for estimating the total effect of earthquakes over a given period. The effect may be measured by return-time, shaking or damage, and may be exerted at a point (e.g. building), on a linear object (e.g. road), or on an area. For each type of effect there are given formulae for the statistical distribution,
G. M. Molchan, V. I. Keilis-Borok, G. V. Vilkovich   +2 more
openaire   +1 more source

Heterogeneous Fracture Slip and Aseismic‐Seismic Transition in a Triaxial Injection Test

Geophysical Research Letters, 2020
Fault/fracture slip and seismicity caused by fluid injection are of major interest to subsurface science and engineering. However, some fundamental aspects of the temporal and spatial evolutions of induced seismicity remain unresolved.
Zhi Ye, Ahmad Ghassemi
doaj   +1 more source

Geodetic displacements and aftershocks following the 2001 M_w = 8.4 Peru earthquake: Implications for the mechanics of the earthquake cycle along subduction zones [PDF]

, 2005
We analyzed aftershocks and postseismic deformation recorded by the continuous GPS station AREQ following the M_w = 8.4, 23 June 2001 Peru earthquake. This station moved by 50 cm trenchward, in a N235°E direction during the coseismic phase, and continued
Avouac, J.-P., Perfettini, H., Ruegg, J.-C.   +2 more
core   +3 more sources

Dual Seismic Migration Velocities in Seismic Swarms

Geophysical Research Letters, 2021
AbstractFluid‐induced earthquake sequences generally appear as expanding swarms activating a particular fault. The recent analysis of a swarm in the Corinth rift has revealed a dual migration pattern, with a global slow expansion (m day−1) and episodes of rapid migration (km day−1).
Dublanchet, Pierre, Barros, Louis De
openaire   +2 more sources

Interpreting intraplate tectonics for seismic hazard : a UK historical perspective [PDF]

, 2012
It is notoriously difficult to construct seismic source models for probabilistic seismic hazard assessment in intraplate areas on the basis of geological information, and many practitioners have given up the task in favour of purely seismicity-based ...
Arup, C Davison, C Davison, CA Cornell, F Scherbaum, G Grünthal, G Woo, JJ Bommer, L Knopoff, M Power, MJ Jiménez, R. M. W. Musson, RMW Musson, RMW Musson, RMW Musson, RMW Musson, WG Milne   +16 more
core   +2 more sources

Bath's law Derived from the Gutenberg-Richter law and from Aftershock Properties [PDF]

, 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.
Agnès Helmstetter, Didier Sornette, Evison F., Michael A. J., Utsu T., Vere‐Jones D.   +5 more
core   +4 more sources

Induced Seismicity Reduces Seismic Hazard? [PDF]

Geophysical Research Letters, 2019
AbstractEarthquakes caused by human activities have been observed for decades. Often these are related to industrial activities pumping fluids into deep geologic formations, like with wastewater disposal. The simplest theory connecting these processes to earthquakes is straightforward: injection leads to fluid pressure changes that either reduce the ...
Andrew J. Barbour, Fred Pollitz
openaire   +1 more source

Stylolite fractal characteristics and the influence of stylolite on strength of limestone

工程科学学报, 2017
To study the fractal characteristics of stylolite and its influence on the strength of limestone, the fractal dimension of horizontal stylolite and vertical stylolite was analyzed using the power spectral density method and the digital image box ...
LU Jian-tao, XU Tao, Patrick Baud, YANG Tian-hong, ZHOU Guang-lei, CHEN Chong-feng   +5 more
doaj   +1 more source

A prediction model for surface deformation caused by underground mining based on spatio-temporal associations

Geomatics, Natural Hazards & Risk, 2022
Accurate predictions of the surface deformation caused by underground mining are crucial for the safe development of underground resources. Although surface deformation has been predicted by artificial intelligence (AI) methods, most AI models are ...
Min Ren, Guanwen Cheng, Wancheng Zhu, Wen Nie, Kai Guan, Tianhong Yang   +5 more
doaj   +1 more source

Importance of direct and indirect triggered seismicity

, 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 overall ...
Agnès Helmstetter, Correig, Davis, Felzer, Felzer, Gardner, Harris, Helmstetter, Kagan, Knopoff, Molchan, Ogata, Ogata, Reasenberg, Sornette, Stein   +15 more
core   +4 more sources