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Articles | Volume 15, issue 12
Articles | Volume 15, issue 12
https://doi.org/10.5194/se-15-1407-2024
© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/se-15-1407-2024
© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 15, issue 12
Research article
 | 
29 Nov 2024
Research article |  | 29 Nov 2024

Earthquakes triggered by the subsurface undrained response to reservoir impoundment at Irapé, Brazil

Haris Raza, George Sand França, Eveline Sayão, and Victor Vilarrasa

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Short summary
Hydropower dams associated with a large reservoir, a key renewable, face challenges like reservoir-triggered seismicity (RTS). Here, rock samples show 6.3 %–14.7 % porosity and a maximum permeability of 0.0098 mD. A 136 m reservoir rise causes a 0.61 MPa pore pressure increase. Vertical stress rises by 0.75 MPa, and horizontal stress falls by 0.48 MPa, which leads to fault destabilization, causing RTS. These facts urge the adoption of sustainable energy strategies and future dam development.
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