Publications

Journal Articles

Journal Articles

2026

Metamodel for porous rock: Porosity and water-weakening controls on brittle–ductile transition in sandstones

G. Shahin; M. Violay 

International Journal of Rock Mechanics and Mining Sciences. 2026. Vol. 203. DOI : 10.1016/j.ijrmms.2026.106546.

Geophysics-assisted imaging of shallow gas pockets and hydrothermal alteration at the summit of La Soufrière de Guadeloupe (Eastern Caribbean)

A. Mendieta; M. Rosas-Carbajal; D. Jessop; J. Komorowski; S. Deroussi et al. 

Bulletin of Volcanology. 2026. Vol. 88, num. 5. DOI : 10.1007/s00445-026-01963-z.

Negative Frictional Healing in Icelandic Geothermal (IDDP‐2) Core Samples: Potential Implications for Detachment‐Fault Mechanics

B. P. Fryer; F. Jermann; P. Patrier; B. Lanson; S. Jelavić et al. 

Geochemistry, Geophysics, Geosystems. 2026. Vol. 27, num. 4. DOI : 10.1029/2025gc012751.

The influence of hydrothermal alteration on the frictional properties of andesites: implications for volcano instability and collapse

C. Giorgetti; M. J. Heap; H. A. Gilg; J-C. Komorowski; M. Violay 

Bulletin of Volcanology. 2026. Vol. 88, num. 4. DOI : 10.1007/s00445-026-01946-0.

Modeling the thermo-mechanical behavior of porous lava under reservoir conditions

G. Shahin; M. J. Heap; A. Gilg 

International Journal of Rock Mechanics and Mining Sciences. 2026. Vol. 199. DOI : 10.1016/j.ijrmms.2025.106383.

Unlocking larger flow and higher temperature with enhanced geothermal systems innovation in 2025

E. Schill; A. Bonneville; J. Norbeck; M. Violay 

Nature Reviews Clean Technology. 2026. Vol. 2, num. 1, p. 17 – 18. DOI : 10.1038/s44359-025-00143-0.

2025

Pore-fluid Pressure Pulses From Rapid, Localized Compaction of a Porous Rock

H. Quelquejay Leclere; D. Faulkner; J. Bedford; J. G. Behnsen; M. Violay et al. 

TECTONOPHYSICS. 2025. Vol. 918. DOI : 10.1016/j.tecto.2025.230951.

Evolving physical and mechanical rock properties during exposure at Earth’s surface

M. Rasmussen; M. C. Eppes; Y. Yuan; P. G. Meredith; K. H. Apostolidis et al. 

Geomorphology. 2025. Vol. 488, p. 109943. DOI : 10.1016/j.geomorph.2025.109943.

The Role of Stress Distribution in Seismic Cycle Complexity of a Long Laboratory Fault

F. Paglialunga; F. Passelègue; J. P. Ampuero; S. Latour; M. Violay 

Geophysical Research Letters. 2025. Vol. 52, num. 18, p. e2025GL116440. DOI : 10.1029/2025GL116440.

Conference Papers

2026

Pore pressure at the crack tip: fluid-induced toughening during tensile fracture of fluid-saturated porous solids

M. Lebihain; A. Guggisberg; M. Allache; P. Braun; M. Violay 

2026. EGU26, the 26th EGU General Assembly 2026, Vienna, Austria, and online, 2026-05-03 – 2026-05-08. DOI : 10.5194/egusphere-egu26-9104.

The role of veinlets in the unconfined behavior of El Teniente Mine rock samples: Implications for mining-induced rockmass failure

F. Robbiano; M. Violay; L. F. Orellana; A. Guggisberg; E. Heinkel 

2026. EGU26, the 26th EGU General Assembly 2026, Vienna, Austria, and online, 2026-05-03 – 2026-05-08. DOI : 10.5194/egusphere-egu26-19556.

Transient permeability in ductile rocks: the competition between deformation and healing

G. Meyer; F. Lazari; M. Violay 

2026. EGU26, the 26th EGU General Assembly 2026, Vienna, Austria, and online, 2026-05-03 – 2026-05-08. DOI : 10.5194/egusphere-egu26-13002.

Lithologic Controls on Frictional Behavior Along the Shallow Subduction Interface: Constraints From an Exhumed Accretionary Wedge (McHugh Complex, Alaska)

M. Rast; W. Behr; C. Madonna; S. Guérin-Marthe 

2026. EGU26, the 26th EGU General Assembly 2026, Vienna, Austria, and online, 2026-05-03 – 2026-05-08. DOI : 10.5194/egusphere-egu26-16525.

The influence of porosity and microstructure on the fracture toughness of basalts from Mt. Etna: laboratory measurements

L. Papanagnou; S. Furst; C. Noël; M. J. Heap; M. Violay et al. 

2026. EGU26, the 26th EGU General Assembly 2026, Vienna, Austria, and online, 2026-05-03 – 2026-05-08. DOI : 10.5194/egusphere-egu26-21233.

Effects of pore fluid chemistry on localised and ductile deformation of porous rocks

F. Lazari; G. Meyer; A. Pluymakers; M. Violay 

2026. EGU26, the 26th EGU General Assembly 2026, Vienna, Austria, and online, 2026-05-03 – 2026-05-08. DOI : 10.5194/egusphere-egu26-19502.

The effect of fluid chemistry on sandstone’s fracture toughness and frictional strength: Implications for brittle and ductile strength

C. Noël; P. Baud; F. Lazari; G. Shahin; M. Violay 

2026. EGU26, the 26th EGU General Assembly 2026, Vienna, Austria, and online, 2026-05-03 – 2026-05-08. DOI : 10.5194/egusphere-egu26-5261.

The effect of frictional heterogeneities on the seismic cycle: Insights from triaxial experiments

C. Noël; P. Dublanchet; C. Twardzik; F. Passelègue 

2026. EGU26, the 26th EGU General Assembly 2026, Vienna, Austria, and online, 2026-05-03 – 2026-05-08. DOI : 10.5194/egusphere-egu26-5279.

Long tunnels maintenance: challenges and lessons learnt. The case study of the Gotthard Base Tunnel

F. Sandrone; A. Bombelli; C. Gambarsi 

2026. RILEM Spring Conference on Durability of Building Materials and Systems in Transportation Infrastructure, Mendrisio, Switzerland, 2025-03-25 – 2025-03-28.

Theses

2026

From Microscopic Failure to Macroscopic Fracture: Understanding Energy Dissipation in Tensile Failure of Rocks

A. Guggisberg / M. E. S. Violay; M. A. D. Lebihain (Dir.)  

Lausanne, EPFL, 2026. 

Working Papers

2026

Poromechanical Toughening in Tensile Fracture of Saturated Solids

A. Guggisberg; M. Allache; P. Braun; M. Lebihain; M. Violay 

2026