Antoine Schlupp | Université de Strasbourg (original) (raw)
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The SeismoCitizen (SismoCitoyen) project presents and tests a new paradigm of collaborative monit... more The SeismoCitizen (SismoCitoyen) project presents and tests a new paradigm of collaborative monitoring of geohazards in urban and peri-urban environments. Seismological observations are obtained using a large number of low cost internet-connected equipment (Raspberry Shake seismic sensors and associated open access data). The breakthrough strategy of the project relies on the deployment of the sensors in residences or administrative buildings of non-seismologist voluntary citizens or authorities. The aim is to use those stations to densify the french permanent seismic network, and to improve the detection and location of seismic events, in particularly small ones. The volunteers take part in a sociological survey to estimate the impact of that participative project on their perception of science. Candidates are primarily chosen according to the seismic interest of their location and for some of them to represent the social variability of the population. Since the “Sismocitoyen” project was launched in 2018 by BCSF-Rénass and EOST (CNRS and Strasbourg University), sixty sensors have been deployed and are currently hosted by voluntary citizens in the region of the Upper Rhine Graben, in the area of Strasbourg, Mulhouse and alongside Vosges mountains. They were able to strongly improve our monitoring of the seismic events induced by a deep geothermal project close to Strasbourg where several events have been largely felt (2019-2022). The topic is becoming a major issue in the development of renewable energies that involve the subsurface as seismic hazards are of significant public concern and can have major socio-economic impacts. With the new PrESENCE ANR project (2022-2025) we focus on seismic hazards induced by deep geothermal operations in northern Alsace and their associated societal perception. Seventy Raspberry Shake seismic stations are being deployed since the end of 2022 and installations will continue in 2023. We will use our previous experience to improve, refine and develop all aspects such as site selection, protection of privacy and confidentiality of volunteers data and information, station calibration before deployment, data transmission and protocol to minimize data losses, stations monitoring and data analysis. During the project, interactions with the station hosts will be reinforced, in particular with convivial meetings (Stammtisch) to answer questions, present the use of the data and the results obtained.
Shakemaps are important tools for characterizing and visualizing the geographic impact of seismic... more Shakemaps are important tools for characterizing and visualizing the geographic impact of seismic events. It is also a great support of communication and crisis management, especially in the early stage following an event. It is thus important to constrain at best the parameters controlling the calculation to have the most reliable shakemaps possible. Our study consists in optimizing the shakemaps in an application for moderate seismic activity in mainland France and French overseas territories. We studied the evolution from v3.5 to v4 of USGS ShakeMapTM and compared the associated shakemaps for past events. An in-depth study of the core calculations of the v4 was necessary to take advantage of their new approaches and optimize the parameters and configuration for the French territories. Our goal was not only to implement the ShakeMap v4 as the new automatic functional version on www.franceseisme.fr, the BCSF-Rénass website (Résif-Epos), but also to evaluate the prospects and limitations for computing high-resolution shakemaps. We analyzed the uncertainties of shakemaps between rapid shaking assessment based on preliminary data and the late reference shakemap based on complete validated datasets for recent damaging or largely felt events in France.What can we improve today to reach high-resolution? What might be possible in a few years? Finally, what are the limits that we may never be able to overcome in the ShakeMapTM program approach?
HAL (Le Centre pour la Communication Scientifique Directe), Nov 10, 2007
HAL (Le Centre pour la Communication Scientifique Directe), Nov 22, 2019
HAL (Le Centre pour la Communication Scientifique Directe), Nov 1, 2019
On November 11, 2019 at 11:53 a.m., the Resif seismological stations recorded an earthquake of a ... more On November 11, 2019 at 11:53 a.m., the Resif seismological stations recorded an earthquake of a magnitude greater than 5 near Montelimar. An analyst from Eost in Strasbourg locates the earthquake manually less than an hour later. He confirms a magnitude of 5.2 Mlv. The characteristics of the earthquake immediately appear remarkable: high magnitude and very low depth (2 to 3 km). This information is confirmed at the same time by the relocation work carried out in ISTerre (Grenoble) and Geoazur (Nice), where the mechanism at the focus is validated from the reactive seismological data, confirming the probable NE-SW direction of the fault. On the same day, the national post-seismic cell was activated and, from then on, many instruments and scientific teams were mobilized to monitor the evolution of the crisis and determine its characteristics with the greatest possible accuracy (magnitude, location, depth, type of associated fault movement, ground movements, etc.). Another surprising feature of this earthquake was quickly observed: it was followed by very few aftershocks. Apart from an aftershock of magnitude 1.5 three minutes after the main shock, the first aftershock (2.2 MLv) felt occurred on November 13. A few days after the first tremor, the CNRS initiated a specific scientific mission in which specialists from the CNRS, universities and other organisations would cooperate to study the event and its causes. Resif is a national research infrastructure dedicated to the observation and understanding of the internal Earth structure and dynamics. Resif is based on high-tech observation networks composed of seismological, geodetic and gravimetric instruments that are densely deployed throughout France. The data collected enable the study of ground deformation, surface and deep structures, local and global seismicity and natural hazards, particularly seismic, on French territory with a high spatio-temporal resolution. Resif is integrated into the European (EPOS - European Plate Observing System) and worldwide systems of instruments used to image the interior of the Earth as a whole and to study numerous natural phenomena.
HAL (Le Centre pour la Communication Scientifique Directe), Mar 9, 2020
Bulletin De La Societe Geologique De France, 2002
The SeismoCitizen (SismoCitoyen) project presents and tests a new paradigm of collaborative monit... more The SeismoCitizen (SismoCitoyen) project presents and tests a new paradigm of collaborative monitoring of geohazards in urban and peri-urban environments. Seismological observations are obtained using a large number of low cost internet-connected equipment (Raspberry Shake seismic sensors and associated open access data). The breakthrough strategy of the project relies on the deployment of the sensors in residences or administrative buildings of non-seismologist voluntary citizens or authorities. The aim is to use those stations to densify the french permanent seismic network, and to improve the detection and location of seismic events, in particularly small ones. The volunteers take part in a sociological survey to estimate the impact of that participative project on their perception of science. Candidates are primarily chosen according to the seismic interest of their location and for some of them to represent the social variability of the population. Since the “Sismocitoyen” pro...
This photo was taken during a Macroseismic Response Group mission that took place November 18-22,... more This photo was taken during a Macroseismic Response Group mission that took place November 18-22, 2019, following the November 11, 2019, magnitude 5.2 Mlv earthquake. A rockfall can be seen in the commune of Le Teil. This is the most affected commune, with collapsed buildings. From the point of view of intensity, the earthquake on this town reached an intensity of VII (on a scale from I to XII). The very shallow depth of the focus of the earthquake (about 2 km), as well as the propagation of the rupture to the surface, imply a much greater intensity of shaking in the epicentral area (up to about 15 km from the epicenter) than for more conventional events of the same magnitude (depth around 10 km). The significant damage to the town of Le Teil is an illustration. This earthquake is the largest in mainland France in terms of impact (extent of intensity VI and above, and damage to the most vulnerable buildings) for 52 years (since the earthquake of Arette in 1967). The macro-seismic in...
HAL (Le Centre pour la Communication Scientifique Directe), 2018
HAL (Le Centre pour la Communication Scientifique Directe), Apr 1, 2010
HAL (Le Centre pour la Communication Scientifique Directe), Jun 1, 2016
Collection des différents formulaires métropolitains d'enquête macrosismique des archives du Bure... more Collection des différents formulaires métropolitains d'enquête macrosismique des archives du Bureau central sismologique français 1910 à décembre 2020. Collection of different metropolitan macroseismic survey forms of archives of the French Central Seismological Office 1910 to December 2020.
Solid Earth, Mar 31, 2022
We present first constraints from tectonic geomorphology and paleoseismology along the newly disc... more We present first constraints from tectonic geomorphology and paleoseismology along the newly discovered Sharkhai fault near the capital city of Mongolia. Detailed observations from high-resolution Pleiades satellite images and field investigations allowed us to map the fault in detail, describe its geometry and segmentation, characterize its kinematics, and document its recent activity and seismic behavior (cumulative displacements and paleoseismicity). The Sharkhai fault displays a surface length of ∼ 40 km with a slightly arcuate geometry, and a strike ranging from N42 to N72 •. It affects numerous drainages that show left-lateral cumulative displacements reaching 94 m. Paleoseismic investigations document faulting and depositional/erosional events for the last ∼ 3000 years and reveal that the most recent event occurred between 775 and 1778 CE and the penultimate earthquake occurred between 1605 and 835 BCE. The resulting time interval of 2496 ± 887 years is the first constraint for the Sharkhai fault for large earthquakes. On the basis of our mapping of the surface rupture and the resulting segmentation analysis, we propose two possible scenarios for large earthquakes with likely magnitudes of 6.7 ± 0.2 or 7.1 ± 0.7. Furthermore, we apply scaling laws to infer coseismic slip values and derive preliminary estimates of longterm slip rates. Finally, these data help build a comprehensive model of active faults in that region and should be considered in the seismic hazard assessment for the city of Ulaanbaatar.
HAL (Le Centre pour la Communication Scientifique Directe), Nov 30, 2015
National audienc
HAL (Le Centre pour la Communication Scientifique Directe), Dec 1, 2010
The SeismoCitizen (SismoCitoyen) project presents and tests a new paradigm of collaborative monit... more The SeismoCitizen (SismoCitoyen) project presents and tests a new paradigm of collaborative monitoring of geohazards in urban and peri-urban environments. Seismological observations are obtained using a large number of low cost internet-connected equipment (Raspberry Shake seismic sensors and associated open access data). The breakthrough strategy of the project relies on the deployment of the sensors in residences or administrative buildings of non-seismologist voluntary citizens or authorities. The aim is to use those stations to densify the french permanent seismic network, and to improve the detection and location of seismic events, in particularly small ones. The volunteers take part in a sociological survey to estimate the impact of that participative project on their perception of science. Candidates are primarily chosen according to the seismic interest of their location and for some of them to represent the social variability of the population. Since the “Sismocitoyen” project was launched in 2018 by BCSF-Rénass and EOST (CNRS and Strasbourg University), sixty sensors have been deployed and are currently hosted by voluntary citizens in the region of the Upper Rhine Graben, in the area of Strasbourg, Mulhouse and alongside Vosges mountains. They were able to strongly improve our monitoring of the seismic events induced by a deep geothermal project close to Strasbourg where several events have been largely felt (2019-2022). The topic is becoming a major issue in the development of renewable energies that involve the subsurface as seismic hazards are of significant public concern and can have major socio-economic impacts. With the new PrESENCE ANR project (2022-2025) we focus on seismic hazards induced by deep geothermal operations in northern Alsace and their associated societal perception. Seventy Raspberry Shake seismic stations are being deployed since the end of 2022 and installations will continue in 2023. We will use our previous experience to improve, refine and develop all aspects such as site selection, protection of privacy and confidentiality of volunteers data and information, station calibration before deployment, data transmission and protocol to minimize data losses, stations monitoring and data analysis. During the project, interactions with the station hosts will be reinforced, in particular with convivial meetings (Stammtisch) to answer questions, present the use of the data and the results obtained.
Shakemaps are important tools for characterizing and visualizing the geographic impact of seismic... more Shakemaps are important tools for characterizing and visualizing the geographic impact of seismic events. It is also a great support of communication and crisis management, especially in the early stage following an event. It is thus important to constrain at best the parameters controlling the calculation to have the most reliable shakemaps possible. Our study consists in optimizing the shakemaps in an application for moderate seismic activity in mainland France and French overseas territories. We studied the evolution from v3.5 to v4 of USGS ShakeMapTM and compared the associated shakemaps for past events. An in-depth study of the core calculations of the v4 was necessary to take advantage of their new approaches and optimize the parameters and configuration for the French territories. Our goal was not only to implement the ShakeMap v4 as the new automatic functional version on www.franceseisme.fr, the BCSF-Rénass website (Résif-Epos), but also to evaluate the prospects and limitations for computing high-resolution shakemaps. We analyzed the uncertainties of shakemaps between rapid shaking assessment based on preliminary data and the late reference shakemap based on complete validated datasets for recent damaging or largely felt events in France.What can we improve today to reach high-resolution? What might be possible in a few years? Finally, what are the limits that we may never be able to overcome in the ShakeMapTM program approach?
HAL (Le Centre pour la Communication Scientifique Directe), Nov 10, 2007
HAL (Le Centre pour la Communication Scientifique Directe), Nov 22, 2019
HAL (Le Centre pour la Communication Scientifique Directe), Nov 1, 2019
On November 11, 2019 at 11:53 a.m., the Resif seismological stations recorded an earthquake of a ... more On November 11, 2019 at 11:53 a.m., the Resif seismological stations recorded an earthquake of a magnitude greater than 5 near Montelimar. An analyst from Eost in Strasbourg locates the earthquake manually less than an hour later. He confirms a magnitude of 5.2 Mlv. The characteristics of the earthquake immediately appear remarkable: high magnitude and very low depth (2 to 3 km). This information is confirmed at the same time by the relocation work carried out in ISTerre (Grenoble) and Geoazur (Nice), where the mechanism at the focus is validated from the reactive seismological data, confirming the probable NE-SW direction of the fault. On the same day, the national post-seismic cell was activated and, from then on, many instruments and scientific teams were mobilized to monitor the evolution of the crisis and determine its characteristics with the greatest possible accuracy (magnitude, location, depth, type of associated fault movement, ground movements, etc.). Another surprising feature of this earthquake was quickly observed: it was followed by very few aftershocks. Apart from an aftershock of magnitude 1.5 three minutes after the main shock, the first aftershock (2.2 MLv) felt occurred on November 13. A few days after the first tremor, the CNRS initiated a specific scientific mission in which specialists from the CNRS, universities and other organisations would cooperate to study the event and its causes. Resif is a national research infrastructure dedicated to the observation and understanding of the internal Earth structure and dynamics. Resif is based on high-tech observation networks composed of seismological, geodetic and gravimetric instruments that are densely deployed throughout France. The data collected enable the study of ground deformation, surface and deep structures, local and global seismicity and natural hazards, particularly seismic, on French territory with a high spatio-temporal resolution. Resif is integrated into the European (EPOS - European Plate Observing System) and worldwide systems of instruments used to image the interior of the Earth as a whole and to study numerous natural phenomena.
HAL (Le Centre pour la Communication Scientifique Directe), Mar 9, 2020
Bulletin De La Societe Geologique De France, 2002
The SeismoCitizen (SismoCitoyen) project presents and tests a new paradigm of collaborative monit... more The SeismoCitizen (SismoCitoyen) project presents and tests a new paradigm of collaborative monitoring of geohazards in urban and peri-urban environments. Seismological observations are obtained using a large number of low cost internet-connected equipment (Raspberry Shake seismic sensors and associated open access data). The breakthrough strategy of the project relies on the deployment of the sensors in residences or administrative buildings of non-seismologist voluntary citizens or authorities. The aim is to use those stations to densify the french permanent seismic network, and to improve the detection and location of seismic events, in particularly small ones. The volunteers take part in a sociological survey to estimate the impact of that participative project on their perception of science. Candidates are primarily chosen according to the seismic interest of their location and for some of them to represent the social variability of the population. Since the “Sismocitoyen” pro...
This photo was taken during a Macroseismic Response Group mission that took place November 18-22,... more This photo was taken during a Macroseismic Response Group mission that took place November 18-22, 2019, following the November 11, 2019, magnitude 5.2 Mlv earthquake. A rockfall can be seen in the commune of Le Teil. This is the most affected commune, with collapsed buildings. From the point of view of intensity, the earthquake on this town reached an intensity of VII (on a scale from I to XII). The very shallow depth of the focus of the earthquake (about 2 km), as well as the propagation of the rupture to the surface, imply a much greater intensity of shaking in the epicentral area (up to about 15 km from the epicenter) than for more conventional events of the same magnitude (depth around 10 km). The significant damage to the town of Le Teil is an illustration. This earthquake is the largest in mainland France in terms of impact (extent of intensity VI and above, and damage to the most vulnerable buildings) for 52 years (since the earthquake of Arette in 1967). The macro-seismic in...
HAL (Le Centre pour la Communication Scientifique Directe), 2018
HAL (Le Centre pour la Communication Scientifique Directe), Apr 1, 2010
HAL (Le Centre pour la Communication Scientifique Directe), Jun 1, 2016
Collection des différents formulaires métropolitains d'enquête macrosismique des archives du Bure... more Collection des différents formulaires métropolitains d'enquête macrosismique des archives du Bureau central sismologique français 1910 à décembre 2020. Collection of different metropolitan macroseismic survey forms of archives of the French Central Seismological Office 1910 to December 2020.
Solid Earth, Mar 31, 2022
We present first constraints from tectonic geomorphology and paleoseismology along the newly disc... more We present first constraints from tectonic geomorphology and paleoseismology along the newly discovered Sharkhai fault near the capital city of Mongolia. Detailed observations from high-resolution Pleiades satellite images and field investigations allowed us to map the fault in detail, describe its geometry and segmentation, characterize its kinematics, and document its recent activity and seismic behavior (cumulative displacements and paleoseismicity). The Sharkhai fault displays a surface length of ∼ 40 km with a slightly arcuate geometry, and a strike ranging from N42 to N72 •. It affects numerous drainages that show left-lateral cumulative displacements reaching 94 m. Paleoseismic investigations document faulting and depositional/erosional events for the last ∼ 3000 years and reveal that the most recent event occurred between 775 and 1778 CE and the penultimate earthquake occurred between 1605 and 835 BCE. The resulting time interval of 2496 ± 887 years is the first constraint for the Sharkhai fault for large earthquakes. On the basis of our mapping of the surface rupture and the resulting segmentation analysis, we propose two possible scenarios for large earthquakes with likely magnitudes of 6.7 ± 0.2 or 7.1 ± 0.7. Furthermore, we apply scaling laws to infer coseismic slip values and derive preliminary estimates of longterm slip rates. Finally, these data help build a comprehensive model of active faults in that region and should be considered in the seismic hazard assessment for the city of Ulaanbaatar.
HAL (Le Centre pour la Communication Scientifique Directe), Nov 30, 2015
National audienc
HAL (Le Centre pour la Communication Scientifique Directe), Dec 1, 2010