E. Aharonov and D. Sparks, Shear profiles and localization in simulations of granular materials, Phys. Rev. E, vol.65, issue.5, p.51302, 2002.

D. V. Anghel, M. Strauss, S. Mcnamara, E. G. Flekkøy, and K. J. Måløy, Erratum: Grains and gas flow: Molecular dynamics with hydrodynamic interactions, Phys. Rev. E, vol.61, issue.2, p.29906, 2000.

R. Bachrach, A. Nur, and A. Agnon, Liquefaction and dynamic poroelasticity in soft sediments, J. Geophys. Res, vol.106, issue.B7, pp.515-528, 2001.

M. A. Biot, General theory for three-dimensional consolidation, J. Appl. Phys, vol.12, p.155, 1941.

M. A. Biot, Theory of propagation of elastic waves in a fluidsaturated porous solid. I. Low-frequency range, J. Acoust. Soc. Am, vol.28, pp.168-178, 1956.
URL : https://hal.archives-ouvertes.fr/hal-01368666

M. A. Biot, Theory of propagation of elastic waves in a fluidsaturated porous solid. II. Higher frequency range, J. Acoust. Soc. Am, vol.28, pp.179-191, 1956.
URL : https://hal.archives-ouvertes.fr/hal-01368666

M. A. Biot, Mechanics of deformation and acoustic propagation in porous dissipative media, J. Appl. Phys, vol.33, issue.4, pp.1482-1498, 1962.

M. L. Blanpied, D. A. Lockner, and J. D. Byerlee, An earthquake mechanism based on rapid sealing of faults, Nature, vol.358, issue.6387, pp.574-576, 1992.

A. Casagrande, Characteristics of cohesionless soils affecting the stability of slopes and earth fills, J. Boston Soc. Civ. Eng, vol.23, pp.13-32, 1936.

G. Castro, Liquefaction of Sands, Harvard Soil Mech. Ser, vol.87, 1969.

K. O. Cetin, N. Isik, and B. Unutmaz, Seismically induced landslide at Degirmendere Nose, Izmit bay during Kocaeli (Izmit)-Turkey earthquake, Soil. Dyn. Earthquake Eng, vol.24, issue.3, pp.189-197, 2004.

M. B. Das, . Pws-kent, M. E. Boston, U. Shamy, and M. Zeghal, A micro-mechanical investigation of the dynamic response and liquefaction of saturated granular soils, Principles of Soil Mechanics, vol.27, pp.712-729, 1993.

E. G. Flekkøy, A. Malthe-sørenssen, and B. Jamtveit, Modeling hydrofracture, J. Geophys. Res, vol.107, issue.B8, p.2151, 2002.

Y. Forterre and O. Pouliquen, Flows of dense granular media, Annu. Rev. Fluid Mech, vol.40, pp.1-24, 2008.
URL : https://hal.archives-ouvertes.fr/hal-01432132

K. M. Frye and C. Marone, The effect of particle dimensionality on granular friction in laboratory shear zones, Geophys. Res. Lett, vol.29, issue.19, p.1916, 2002.

E. J. Gabet and S. M. Mudd, The mobilization of debris flows from shallow landslides, Geomorphology, vol.74, pp.207-218, 2006.

D. I. Garagash and J. W. Rudnicki, Shear heating of a fluidsaturated slip-weakening dilatant fault zone: 1. Limiting regimes, J. Geophys. Res, vol.108, issue.B2, p.2121, 2003.

V. K. Garga and H. Zhang, Volume changes in undrained triaxial tests on sands, Can. Geotech. J, vol.34, pp.762-772, 1997.

Y. Hamiel, V. Lyakhovsky, and A. Agnon, Rock dilation, nonlinear deformation, and pore pressure change under shear, Earth Planet. Sci. Lett, vol.237, issue.3-4, pp.577-589, 2005.

R. M. Iverson, Differential-equations governing slip-induced porepressure fluctuations in a water-saturated granular medium, Math. Geol, vol.25, issue.8, pp.1027-1048, 1993.

R. M. Iverson, Regulation of landslide motion by dilatancy and pore pressure feedback, J. Geophys. Res, vol.110, p.2015, 2005.

R. M. Iverson and R. G. Lahusen, Dynamic pore-pressure fluctuations in rapidly shearing granular-materials, Science, issue.4931, pp.796-799, 1989.

R. M. Iverson, M. E. Reid, and R. G. Lahusen, Debris-flow mobilization from landslides, Annu. Rev. Earth Planet. Sci, vol.25, pp.85-138, 1997.

R. M. Iverson, M. E. Reid, N. R. Iverson, R. G. Lahusen, M. Logan et al., Acute sensitivity of landslide rates to initial soil porosity, Science, vol.290, issue.5491, pp.513-516, 2000.

Ø. Johnsen, R. Toussaint, K. L. Måløy, and E. G. Flekkøy, Pattern formation during air injection into granular materials confined in a circular Hele-Shaw cell, Phys. Rev. E, vol.74, issue.1, p.11301, 2006.
URL : https://hal.archives-ouvertes.fr/hal-00107351

Ø. Johnsen, R. Toussaint, K. J. Måløy, E. G. Flekkøy, and J. Schmittbuhl, Coupled air/granular flow in a linear Hele-Shaw cell, Phys. Rev. E, vol.77, issue.1, p.11301, 2007.
URL : https://hal.archives-ouvertes.fr/hal-01909821

Ø. Johnsen, C. Chevalier, A. Lindner, R. Toussaint, E. C. Måløy et al., Decompaction and fluidization of a saturated and confined granular medium by injection of a viscous liquid or a gas, Phys. Rev. E, vol.78, issue.5, p.51302, 2008.
URL : https://hal.archives-ouvertes.fr/hal-01909972

F. Kawakami and A. Asada, Damage to the ground and earth structures by the Niigata earthquake of, Soil Found, vol.6, issue.1, pp.14-30, 1964.

R. Kherbouche, J. F. Shao, F. Skoczylas, and J. P. Henry, On the poroplastic behavior of porous rocks, Eur. J. Mech. A, Solids, vol.14, issue.4, pp.577-587, 1995.

M. V. Kostadinov and I. Towhata, Assessment of liquefactioninducing peak ground velocity and frequency of horizontal ground shaking at onset of phenomenon, Soil. Dyn. Earthquake Eng, vol.22, issue.4, pp.309-322, 2002.

V. G. Kozlov, A. A. Ivanova, and P. Evesque, Sand behavior in a cavity with incompressible liquid under vertical vibrations, Europhys. Lett, vol.42, issue.4, pp.413-418, 1998.

S. L. Kramer, Geotechnical Earthquake Engineering, 1996.

X. Li, X. Chu, and D. Sheng, A saturated discrete particle model and characteristic-based SPH method in granular materials, Int. J. Numer. Methods Eng, vol.72, pp.858-882, 2007.

N. Makedonska, L. Goren, D. Sparks, and E. Aharonov, What controls the effective friction of shearing granular media?, Meso-Scale Shear Physics in Earthquake and Landslide Mechanics, pp.191-203, 2010.

M. T. Manzari, K. Arulanandan, and R. F. Scott, VELACS project: A summary of achievements, Proceedings From the Fifth U.S.-Japan Workshop on Earthquake Resistant Design of Lifeline Facilities and Countermeasures Against Liquefaction, pp.389-404, 1994.

C. Marone, C. B. Raleigh, and C. H. Scholz, Frictional behavior and constitutive modeling of simulated fault gouge, J. Geophys. Res, vol.95, pp.7007-7025, 1990.

D. Mckenzie and J. N. Brune, Melting on fault planes during large earthquakes, Geophys. J. R. Astron. Soc, vol.29, pp.65-78, 1972.

S. Mcnamara, E. G. Flekkøy, and K. J. Måløy, Grains and gas flow: Molecular dynamics with hydrodynamic interactions, Phys. Rev. E, vol.61, issue.4, pp.4054-4059, 2000.

S. A. Miller and A. Nur, Permeability as a toggle switch in fluidcontrolled crustal processes, Earth Planet. Sci. Lett, vol.183, pp.263-269, 2000.

P. L. Moore and N. R. Iverson, Slow episodic shear of granular materials regulated by dilatant strengthening, Geology, vol.30, issue.9, pp.843-846, 2002.

R. Mourgues and P. Cobbold, Some tectonic consequences of fluid overpressures and seepage forces as demonstrated by sandbox modelling, Tectonophysics, vol.376, issue.1-2, pp.75-97, 2003.

Y. Okada and H. Ochiai, Coupling pore-water pressure with distinct element method and steady state strengths in numerical triaxial tests under undrained conditions, Landslides, vol.4, pp.357-369, 2007.

T. Osswald, Polymer Processing Fundamental, 1998.

R. Popescu and J. H. Prevost, Comparison between VELACS numerical class-A predictions and centrifuge experimental soil testresults, Soil. Dyn. Earthquake Eng, vol.14, issue.2, p.38, 1995.

P. W. Rowe, The stress-dilatancy relation for static equilibrium of an assembly of particles in contact, Proc. R. Soc. London, Ser. A, vol.269, pp.500-527, 1962.

A. Y. Rozhko, Y. Y. Podladchikov, and F. Renard, Failure patterns caused by localized rise in pore-fluid overpressure and effective strength of rocks, Geophys. Res. Lett, vol.34, p.22304, 2007.
URL : https://hal.archives-ouvertes.fr/hal-00201803

M. O. Saar and M. Manga, Depth dependence of permeability in the Oregon Cascades inferred from hydrologic, thermal, seismic and magnetic modeling constraints, J. Geophys. Res, vol.109, 2004.

J. Samuelson, D. Elsworth, and C. Marone, Shear-induced dilatancy of fluid-saturated faults: Experiment and theory, J. Geophys. Res, vol.114, p.12404, 2009.

A. Sawicki and J. Mierczynski, Developments in modeling liquefaction of granular soils, caused by cyclic loads, Appl. Mech. Rev, vol.59, pp.91-106, 2006.

C. Scawthorn and P. I. Yanev, Preliminary report 17, vol.17, pp.146-157, 1995.

C. H. Scholz, The Mechanics of Earthquakes and Faulting, 1990.

P. Segall and J. R. Rice, Dilatancy, compaction, and slip instability of fluid-infiltrated fault, J. Geophys. Res, vol.100, issue.B11, pp.155-177, 1995.

R. C. Sidle and H. Ochiai, Landslides Processes, Prediction, and Land Use, vol.18, 2006.

A. W. Skempton, Terzaghi's discovery of effective stress, in From Theory to Practice in Soil Mechanics, pp.42-53, 1960.

N. H. Sleep and M. L. Blanpied, Creep, compaction and the weak rheology of major faults, Nature, issue.6397, pp.687-692, 1992.

A. Snieder, A. Van-der, and . Beukel, The liquefaction cycle and the role of drainage in liquefaction, Granul. Matter, vol.6, pp.1-9, 2004.

K. Soga, Soil liquefaction effects observed in the Kobe earthquake of 1995, Proc. Inst. Civ. Eng. Geotech. Eng, vol.131, issue.1, pp.34-51, 1998.

K. Terzaghi, Theoretical Soil Mechanics, 1943.

J. L. Vinningland, Ø. Johnsen, E. G. Flekkøy, R. Toussaint, and K. J. Måløy, Granular Rayleigh-Taylor instability: Experiments and simulations, Phys. Rev. Lett, vol.99, issue.4, 2007.
URL : https://hal.archives-ouvertes.fr/hal-01909759

J. L. Vinningland, Ø. Johnsen, E. G. Flekkøy, R. Toussaint, and K. J. Måløy, Experiments and simulations of a gravitational granular flow instability, Phys. Rev. E, vol.76, issue.5, p.51306, 2007.
URL : https://hal.archives-ouvertes.fr/hal-01909770

B. Voight and C. Faust, Frictional heat and strength loss in some rapid landslides, Geotechnique, vol.32, issue.1, pp.43-54, 1982.

J. Walder and A. Nur, Porosity reduction and crustal pore pressure development, J. Geophys. Res, vol.89, issue.B13, pp.539-550, 1984.

H. F. Wang, Theory of Linear Poroelasticity With Applications to Geomechanics and Hydrogeology, 2000.

T. Yamashita, Pore creation due to fault slip in a fluid-permeated fault zone and its effect on seismicity: Generation mechanism of earthquake swarm, Pure Appl. Geophys, vol.155, pp.625-647, 1999.

T. L. Youd, Compaction of sands by repeated shear straining, J. Soil Mech. Found. Design, vol.98, pp.709-725, 1972.

O. C. Zienkiewicz, A. H. Chan, M. Pastor, B. A. Schrefler, and T. Shiomi, Computational Geomechanics With Special Reference to Earthquake Engineering, 1999.

E. Aharonov,

L. Goren, Rehovot 76100, Israel. (liran.goren@ weizmann.ac.il) D. W. Sparks, Department of Geology and Geophysics