What does this research mean for the field?

Combining manual and deep-learning-based detection methods with a local 3D velocity model significantly reduces earthquake location uncertainties and generates a robust, high-resolution seismicity catalog for the Lacq region. Novelty: ClaimNovelty.METHODOLOGICAL. Consensus alignment: ConsensusAlignment.NEUTRAL.

What question did this study set out to answer?

To resolve earthquake location uncertainties and establish whether induced seismic events occur within or beneath an exploited gas reservoir.

September 14, 2026Geophysical Journal InternationalOpen Access

Analysis of 5 years of continuous monitoring (2021-2026) of the Lacq induced seismicity (Southwestern France)

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Authors

JLJean LetortCentre National de la Recherche Scientifique BDBenoît DerodeCentre National de la Recherche Scientifique FCFabrice CottonInstitut de Radioprotection et de Sûreté Nucléaire

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Implication

Observational study reveals high-resolution earthquake locations in an exploited gas reservoir, suggesting clearer mechanisms for mitigating induced seismic risk.

Key Points

To resolve earthquake location uncertainties and establish whether induced seismic events occur within or beneath an exploited gas reservoir.
Deployed a temporary seismic monitoring network across the Lacq area during a five-year period from 2021 to 2026.
Identified and located seismic events using both manual picking/relocation workflows and automated deep-learning algorithms integrated with a local 3D velocity model.
Generated a comprehensive, high-resolution seismicity catalog with substantially reduced hypocentral location uncertainties.
Demonstrated improved catalog completeness and detection robustness through the dual manual and deep-learning processing strategy.

Cite This Study

Letort et al. (2026) studied this question.

synapsesocial.com/papers/6aa7b2e10926e14a848b167c https://doi.org/10.1093/gji/ggag372

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Implication

Observational study reveals high-resolution earthquake locations in an exploited gas reservoir, suggesting clearer mechanisms for mitigating induced seismic risk.

Analysis of 5 years of continuous monitoring (2021-2026) of the Lacq induced seismicity (Southwestern France)

Discussion

Member takes

Implication

Key Points

Cite This Study

Analysis of 5 years of continuous monitoring (2021-2026) of the Lacq induced seismicity (Southwestern France)

Discussion

Member takes

Implication

Key Points

Cite This Study

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