Extracting small deformation beyond individual station precision from dense Global Navigation Satellite System (GNSS) networks in France and western Europe
| العنوان: | Extracting small deformation beyond individual station precision from dense Global Navigation Satellite System (GNSS) networks in France and western Europe |
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| المؤلفون: | Erik Doerflinger, Philippe Vernant, Stéphane Mazzotti, Christine Masson |
| المساهمون: | Géosciences Montpellier, Institut national des sciences de l'Univers (INSU - CNRS)-Université de Montpellier (UM)-Université des Antilles (UA)-Centre National de la Recherche Scientifique (CNRS) |
| المصدر: | Solid Earth Solid Earth, European Geosciences Union, 2019, 10 (6), pp.1905-1920. ⟨10.5194/se-10-1905-2019⟩ Solid Earth, Vol 10, Pp 1905-1920 (2019) |
| سنة النشر: | 2019 |
| مصطلحات موضوعية: | 010504 meteorology & atmospheric sciences, [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph], Stratigraphy, Soil Science, Satellite system, Induced seismicity, Structural basin, Deformation (meteorology), 010502 geochemistry & geophysics, 01 natural sciences, Synthetic data, lcsh:Stratigraphy, Geochemistry and Petrology, Cluster analysis, lcsh:QE640-699, 0105 earth and related environmental sciences, Earth-Surface Processes, business.industry, lcsh:QE1-996.5, Paleontology, Geology, Geodesy, lcsh:Geology, Geophysics, GNSS applications, Global Positioning System, business |
| الوصف: | We use 2 decades of data from a dense geodetic network to extract regionally coherent velocities and deformation rates in France and neighboring western European countries. This analysis is combined with statistical tests on synthetic data to quantify the deformation detection thresholds and significance levels. By combining two distinct methods – Gaussian smoothing and k-means clustering – we extract horizontal deformations with a 95 % confidence level of ca. 0.1–0.2 mm yr−1 (ca. 0.5–1×10-9 yr−1) on spatial scales of 100–200 km or more. From these analyses, we show that the regionally average velocity and strain rate fields are statistically significant in most of our study area. The first-order deformation signal in France and neighboring western European countries is a belt of N–S to NE–SW shortening of ca. 0.2–0.4 mm yr−1 (1–2×10-9 yr−1) in central and eastern France. In addition to this large-scale signal, patterns of orogen-normal extension are observed in the Alps and the Pyrenees, but methodological biases, mainly related to GPS (Global Positioning System) solution combinations, limit the spatial resolution and preclude associations with specific geological structures. The patterns of deformation in western France show either tantalizing correlation (Brittany) or anticorrelation (Aquitaine Basin) with the seismicity. Overall, more detailed analyses are required to address the possible origin of these signals and the potential role of aseismic deformation. |
| وصف الملف: | application/pdf |
| اللغة: | English |
| تدمد: | 1869-9529 1869-9510 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f4e8f3e7758684e142cea6fcd59df985 https://www.solid-earth.net/10/1905/2019/ |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi.dedup.....f4e8f3e7758684e142cea6fcd59df985 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 18699529 18699510 |
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