Frédérick Massin

Last Name

Massin

First Name

Frédérick

ORCID

0000-0002-7532-5139

Organisational unit

02334 - BULGG - Bedretto Underground Lab / BULGG - Bedretto Underground Lab

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Publications 1 - 10 of 43

Probabilistic Focal Mechanism Estimation Based on Body-Wave Waveforms through Source-Scanning Algorithm
Massin, Frédérick; Malcolm, Alison (2018)
Bulletin of the Seismological Society of America
EEW in SC3 - FinDer and the virtual Seismologist
Massin, Frédérick; Böse, Maren; Behr, Yannik; et al. (2018)
Book of Abstracts of the 36th General Assembly of the European Seismological Commission
Numerous methodologies for Earthquake Early Warning (EEW) exist and have been hardened into production-level software at many networks. Mostly, these implementations are standalone programs independent of the operational earthquake monitoring systems that provide network locations within minutes of an earthquake. Therefore, to manage such an EEW infrastructure is ressource-expensive and most tasks, just as streaming / managing metadata / archiving performance / staging playbacks need to be implemented differently in each environment. This means operating EEW becomes a major effort requiring significant resources, which hampers networks to evaluate their readiness for EEW and demonstrate EEW to potential end-users. The SED has been developing methods and open-source software for Earthquake Early Warning for 10 years. The seismic network at SED migrated to SeisComP3 (SC3) for automated seismic bulletin generation in 2012. Since then, all software for EEW are developed as modules within an SC3 framework. In this presentation, we describe the Virtual Seismologist (VS) and Finite-Fault Rupture Detector (FinDer) methodologies and show how they are integrated into SC3. VS is a traditional approach that builds on existing SC3 detection and location modules for point-source models. FinDer matches growing patterns of observed ground motion with modelled templates to identify line faults, and hence can infer on-going finite-fault rupture in realtime. Together these methods can provide EEW for all event dimensions from moderate to great, if there is a high quality, EEW- ready, seismic network in place. We also describe the desktop EEW Display tool (EEWD) that receives and displays EEW messages and can be used to demonstrate EEW. The EEW package in SC3 is deployed for testing in various places including Switzerland, Central America and Chile. We summarise performance in key events. Providing our open-source modules within SeisComP3 means operators interested EEW that operate SC3 can easily evaluate the potential for EEW in their network - a single agency can operate both the traditional monitoring and EEW using a minimum of resources.
Seismicity of La Réunion island
Duputel, Zacharie; Ferrazzini, Valérie; Lengliné, Olivier; et al. (2022)
Comptes Rendus. Géoscience
The island of La Réunion is made up of two main shield volcanoes: Piton des Neiges and Piton de la Fournaise. A wide variety of seismic events is observed, including but not limited to: tectonic events, volcano-tectonic earthquakes, volcanic tremors, long-period and very-long-period earthquakes. The seismicity of La Réunion island illuminates different levels of its volcanic plumbing system. In the shallowest part of Piton de la Fournaise, earthquakes are clustered below the volcano summit area and often occur as intense seismic swarms during magma intrusions. Seismic activity is also observed below the East flank of Piton de la Fournaise, shaping an eastward dipping structure possibly accommodating seaward displacements of the volcano. At larger depths, episodes of upward seismicity migrations indicate magmatic recharges of the shallow reservoir from deeper parts of the volcano plumbing system. Earthquakes are also observed below the oceanic crust in a zone of underplating between Piton des Neiges and Piton de la Fournaise. A major event at Piton de la Fournaise was the collapse of its summit caldera in April 2007. This activity resulting in a summital depression of 330 m was accompanied by very-long-period earthquakes with magnitudes ranging from MW = 4.4 to MW = 5.4. Another noticeable activity in La Réunion island is an active seismic swarm located within the oceanic crust under the North flank of Piton des Neiges. The origin of this sustained seismic activity is still unclear and is currently investigated, thanks to the deployments of additional stations in the region.
Towards a dynamic earthquake risk framework for Switzerland
Böse, Maren; Danciu, Laurentiu; Papadopoulos, Athanasios N.; et al. (2024)
Natural Hazards and Earth System Sciences
Scientists from different disciplines at ETH Zurich are developing a dynamic, harmonised, and user-centred earthquake risk framework for Switzerland, relying on a continuously evolving earthquake catalogue generated by the Swiss Seismological Service (SED) using the national seismic networks. This framework uses all available information to assess seismic risk at various stages and facilitates widespread dissemination and communication of the resulting information. Earthquake risk products and services include operational earthquake (loss) forecasting (OE(L)F), earthquake early warning (EEW), ShakeMaps, rapid impact assessment (RIA), structural health monitoring (SHM), and recovery and rebuilding efforts (RRE). Standardisation of products and workflows across various applications is essential for achieving broad adoption, universal recognition, and maximum synergies. In the Swiss dynamic earthquake risk framework, the harmonisation of products into seamless solutions that access the same databases, workflows, and software is a crucial component. A user-centred approach utilising quantitative and qualitative social science tools like online surveys and focus groups is a significant innovation featured in all products and services. Here we report on the key considerations and developments of the framework and its components. This paper may serve as a reference guide for other countries wishing to establish similar services for seismic risk reduction.
Incorporating fault maturity-related earthquake slip characteristics into final rupture length determination for Earthquake Early Warning
Hutchison, Alexandra A.; Böse, Maren; Massin, Frédérick; et al. (2019)
AGU Fall Meeting Abstracts
Lake ice seismicity: seismic and acoustic observations
Schmelzbach, Cédric; Wetter, Christoph; Stähler, Simon Christian; et al. (2024)
EGUsphere
Seismic events (icequakes) associated with floating ice sheets on lakes are a frequently observed phenomenon. We find at our study site on the frozen Lake St. Moritz in the Swiss Alps typically a clear diurnal pattern with hundreds to thousands of icequake signals per hour during night time, while the rate of observed events during daytime is about two orders of magnitude smaller. The seismicity rate shows a significant correlation with temperature changes. It is therefore assumed that the generation of the ice quakes is related to melting and freezing processes as well as the extension and contraction of the ice. Potentially the seismicity rate is also moderated by loading and unloading due to human activities on the ice and/or lake level changes. These ice quakes generate seismic waves that propagate through the thin ice sheet as plate waves modulated by the air and water half-spaces above and below the ice (quasi-guided waves). One member of this wave-type family, the quasi-Scholte waves, are characterised by distinct dispersion that can be observed with seismic sensors on the ice. Furthermore, the seismic waves traveling through the ice couple into the air leading to audible seismo-acoustic signals. One particularity of the ice-air coupling is a so-called coincidence phenomenon. The particular velocity-frequency combination where the seismic wavelength in the ice matches the apparent acoustic wavelength in the air leads to a resonance phenomenon. Observation of the related coincidence frequency allows us, for example, to infer on the ice thickness from the acoustic observations with a low cost microphone above the ice only. Recording the acoustic signals with small microphone arrays enables additionally, for example, locating the source of the seismo-acoustic signal. Combined observations of the seismic and acoustic signals provide new insights into the seismicity of lake ice which has rarely been studied in the past. The seismo-acoustic signals have the potential to provide information about the ice properties such as thickness and ice quality as well as waxing and waning processes of ice sheets. These observations are relevant for safe operations on the ice but also to complement other remote-sensing observations with autonomous in situ seismo-acoustic measurements for climate studies.
Unraveling the complex deformation pattern at Yellowstone plateau through seismicity and fracture analysis
Russo, Elena; Tibaldi, Alessandro; Waite, Greg P.; et al. (2020)
Tectonophysics
Rapid Rupture Characterisation for New Zealand Using the Finite-Fault Rupture Detector (FinDer) Algorithm
Andrews, Jennifer Rebecca; Behr, Yannik; Boese, Maren; et al. (2022)
AGU Fall Meeting Abstracts
As earthquake early warning (EEW) systems are becoming more widely implemented and explored around the world, their methods are being adopted, tested and adapted for different regions. In addition, immediately after a significant earthquake, rapid scientific information from these same tools is critical for response decision-making and estimating secondary hazards and is a key component of advisories and public communication. Characterisation of the rupture extent is especially valuable, as it strongly controls ground motion estimates, or, in offshore settings, tsunami forecasts. The Finite-fault Rupture Detector (FinDer) is designed to rapidly estimate the location, extent and orientation of the earthquake fault rupture by matching spatial distributions of high-frequency seismic amplitudes with pre-computed templates. Originally developed for earthquake early warning (EEW), it is part of the ShakeAlert system for the west coast of the US. It is also running real-time in Central America and Switzerland and has been run offline in central Italy, Japan, and China, and at global scale using EMSC felt reports. Under a large public initiative to better prepare for and respond to natural disasters (https://www.rcet.science), FinDer is now being implemented in New Zealand both as a real-time (utilizing SeisComP) and offline tool for rapid characterisation. Here we report status and performance. We have modified configurations for the New Zealand setting, including creating new template sets. We carry out a range of offline tests using historic and synthetic earthquake sources, allowing us to systematically evaluate FinDer behaviour. We will also present results from the real-time system. We analyse rupture parameter recovery as well as resultant ground motion estimates, providing performance data that can guide real-time usage and interpretation.
Seismicity and magma intrusions at Yellowstone supervolcano: new insights
Russo, Elena; Tibaldi, Alessandro; Bonali, Fabio L.; et al. (2019)
Geophysical Research Abstracts
Probabilistic source mechanism estimation based on body-wave waveforms through shift and stack algorithm.
Massin, Frédérick; Malcolm, Alison (2018)
AGU Fall Meeting Abstracts

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Frédérick Massin

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