2021
DOI: 10.5194/se-12-1661-2021
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Present-day geodynamics of the Western Alps: new insights from earthquake mechanisms

Abstract: Abstract. Due to the low to moderate seismicity of the European Western Alps, few focal mechanisms are available in this region to this day, and the corresponding current seismic stress and strain fields remain partly elusive. The development of dense seismic networks in past decades now provides a substantial number of seismic records in the 0–5 magnitude range. The corresponding data, while challenging to handle due to their amount and relative noise, represent a new opportunity to increase the spatial resol… Show more

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Cited by 19 publications
(23 citation statements)
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References 85 publications
(133 reference statements)
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“…The present-day deformation and stress fields in the crust have been studied in the Alps using analysis of GNSS data and earthquake focal mechanisms (e.g. Delacou et al, 2004;Heidbach et al, 2018;Mathey et al, 2020). Seismic anisotropy provides complementary information on the history of deformation as stress and deformation directly affect the alignment of seismically anisotropic minerals, as well as lithospheric structures such as faults, fluids, layering, etc.…”
mentioning
confidence: 99%
“…The present-day deformation and stress fields in the crust have been studied in the Alps using analysis of GNSS data and earthquake focal mechanisms (e.g. Delacou et al, 2004;Heidbach et al, 2018;Mathey et al, 2020). Seismic anisotropy provides complementary information on the history of deformation as stress and deformation directly affect the alignment of seismically anisotropic minerals, as well as lithospheric structures such as faults, fluids, layering, etc.…”
mentioning
confidence: 99%
“…4b). This faulting style is opposite to that observed in the focal mechanisms along the IMNF (Delacou et al, 2004;Mathey et al, 2021;Sue et al, 1999). For the Belledonne Fault, the GIA stress perturbation favors reverse faulting (r = 60-130) while the focal mechanisms show right-lateral strike-slip (r = 180 ± 20; Thouvenot et al, 2003).…”
Section: Gia Stress Perturbations On Active Faultsmentioning
confidence: 77%
“…70 5-10 km, and a smaller eastern cluster, with deeper focal depths ca. 10-20 km (Mathey et al, 2021). The surrounding lower https://doi.org/10.5194/egusphere-2023-538 altitude and foreland regions show a mix of strike-slip and reverse faulting with a general arc-perpendicular compression (Fig.…”
Section: Western Alps Seismicity and Gnss Strain Ratesmentioning
confidence: 98%
“…The surrounding lower https://doi.org/10.5194/egusphere-2023-538 altitude and foreland regions show a mix of strike-slip and reverse faulting with a general arc-perpendicular compression (Fig. 2b; Delacou et al, 2004;Mathey et al, 2021;Mazzotti et al, 2021;. In general, only a few known fault structures can be associated with observed seismicity, e.g.…”
Section: Western Alps Seismicity and Gnss Strain Ratesmentioning
confidence: 99%
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