Seismotectonics and 1-D velocity model of the Greater Geneva Basin, France-Switzerland
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F20%3A10420977" target="_blank" >RIV/00216208:11320/20:10420977 - isvavai.cz</a>
Result on the web
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=edv2Bxd14j" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=edv2Bxd14j</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1093/gji/ggaa129" target="_blank" >10.1093/gji/ggaa129</a>
Alternative languages
Result language
angličtina
Original language name
Seismotectonics and 1-D velocity model of the Greater Geneva Basin, France-Switzerland
Original language description
The Greater Geneva Basin (GGB), located in southwestern Switzerland and neighboring France, is enclosed by the rotating northwestern edge of the Alpine front and the Jura mountains chain. Recently, this basin has received increasing attention as a target for geothermal exploration. Historical and instrumental seismicity suggest that faults affecting the basin may still be active. Moderate-magnitude earthquakes have been located along the Vuache fault, a major strike-slip structure crossing the basin. Before geothermal exploration starts, it is key to evaluate the seismic rate in the region and identify possible seismogenic areas. In this context, we deployed a temporary seismic network of 20 broad-band stations (from September 2016 to January 2018) to investigate the ongoing seismic activity, its relationship with local tectonic structures, and the large-scale kinematics of the area. Our network lowered the magnitude of completeness of the permanent Swiss and French networks from 2.0 to a theoretical value of 0.5. Using a new coherence-based detector (LASSIE - particularly effective to detect microseismicity in noisy environments), we recorded scarce seismicity in the basin with local magnitudes ranging from 0.7 to 2.1 M-L. No earthquakes were found in the Canton of Geneva where geothermal activities will take place. We constructed a local 'minimum 1-D P-wave velocity model' adapted to the GGB using earthquakes from surrounding regions. We relocated the events of our catalogue obtaining deeper hypocentres compared to the locations obtained using the available regional velocity models. We also retrieved eight new focal mechanisms using a combination of polarities and waveform inversion techniques (CSPS). The stress inversion shows a pure strike-slip stress regime, which is in agreement with structural and geological data. Combining the background seismicity with our catalogue, we identified seismogenic areas offsetting the basin.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10500 - Earth and related environmental sciences
Result continuities
Project
<a href="/en/project/GC18-06716J" target="_blank" >GC18-06716J: BAIES - Bayesian Inference of Earthquake Source parameters: kinematic and dynamic finite fault models</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2020
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Geophysical Journal International
ISSN
0956-540X
e-ISSN
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Volume of the periodical
221
Issue of the periodical within the volume
3
Country of publishing house
GB - UNITED KINGDOM
Number of pages
22
Pages from-to
2026-2047
UT code for WoS article
000536503700039
EID of the result in the Scopus database
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