Improvement of broadband seismic station installations at the Observatoire de Grenoble (OSUG) seismic network

Langlais, Mickaël; Vial, Benjamin; Coutant, Olivier

doi:10.5194/adgeo-34-9-2013

Cited by 3 publications

(4 citation statements)

References 8 publications

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“…The remaining coherence on the horizontal component might be due to tilt and not to a direct pressure effect on the masses. Those results are consistent with the TANK shielding used in Observatoire de Grenoble (OSUG) seismic network, which was inspired by CASSIS design (Langlais et al, 2013).…”

Section: Cassis Shieldingsupporting

confidence: 85%

“…Figure 7 shows the noise performance of 6 Trillium240 and 6 Trillium120PA stations installed in Guadeloupe, Martinique, Carriacou, Dominica, Antigua and Saint-Lucia, during November 2014. The stations PSDs were calculated and merged with PQLX software (McNamara and Boaz, 2005). Then, PDFs median noise and their 50, 80 and 90 % contours were calculated.…”

Section: Network Performancementioning

confidence: 99%

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Significant technical advances in broadband seismic stations in the Lesser Antilles

et al. 2015

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Abstract. In the last few years, French West Indies observatories from the Institut de Physique du Globe de Paris (IPGP), in collaboration with The UWI Seismic Research Centre (SRC, University of West Indies), have modernized the Lesser Antilles Arc seismic and deformation monitoring network. 15 new, permanent stations have been installed that strengthen and expand its detection capabilities. The global network of the IPGP-SRC consortium is now composed of 20 modernized stations, all equipped with broadband seismometers, strong motion sensors, Global Positioning System (GPS) sensors and satellite communication for real-time data transfer. To enhance the sensitivity and reduce ambient noise, special efforts were made to improve the design of the seismic vault and the original Stuttgart shielding of the broadband seismometers (240 and 120s corner period). Tests were conducted for several months, involving different types of countermeasures, to achieve the highest performance level of the seismometers. GPS data, realtime and validated seismic data (only broadband) are now available from the IPGP data centre (http://centrededonnees.ipgp.fr/index.php?&lang=EN). This upgraded network feeds the Caribbean Tsunami Warning System supported by UNESCO and establishes a monitoring tool that produces high quality data for studying subduction and volcanic processes in the Lesser Antilles arc.

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Section: Cassis Shieldingsupporting

confidence: 85%

Section: Network Performancementioning

confidence: 99%

Significant technical advances in broadband seismic stations in the Lesser Antilles

et al. 2015

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“…At the beginning of 2010, at the initiative of the ISTerre-OSUG team, the upgrading of the network was launched, the first step of the Résif-Epos project (Réseau sismologique et géodésique français-French seismological and geodetical network; FDSN code: FR; RESIF-RLBP, 1995) with the objective of bringing together in a research infrastructure all the national and regional networks (such as SISmalp) and mobile station pool in France [Péquegnat et al, 2021]. Over this period, efforts have focused both on the upgrading of recording sites, related to the quality of the site [Langlais et al, 2013] and the real time and continuous data management through seedlink protocols, and the use of Seiscomp3 software [Weber et al, 2007] for the processing and automatic detection of earthquakes. As of 2016, SISmalp covered all the instrumented sites managed by ISTerre-OSUG for Earth observatory in the northern Alps, including broadband and accelerometric stations (Figure 3).…”

Section: Operational Monitoring Of the Seismic Sequence Of The Maurienne Swarmmentioning

confidence: 99%

Unprecedented seismic swarm in the Maurienne valley (2017–2019) observed by the SISmalp Alpine seismic network: operational monitoring and management

Guéguen¹,

Janex²,

Nomade³

et al. 2022

Comptes Rendus. Géoscience

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In 2017-2019, a seismic swarm was triggered in the Maurienne valley (French Alps), with more than 5000 events detected by the regional SISmalp network. The population, who asked SISmalp to provide information on the processes and the associated risk, felt many earthquakes. In a post-L'Aquila trial context, we conducted a reflection on the scientific and social operational management of the crisis. The geological and tectonic analysis, the deployment of a temporary seismic network, an automatic double-difference relocation procedure (HypoDD) after clustering earthquakes, as well as the interactions with the population and the risk managers, have been carried out jointly. The length and unpredictability of the sequence complicated crisis management and the relations between local authorities and civil protection. The involvement of SISmalp, beyond its main scientific and observation prerogatives, has contributed to moderate the fears of the population by providing scientific explanations.

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“…It is well known that an appropriate thermal insulation of the sensor strongly improves the noise level at long periods on all components (e.g. Langlais et al, 2013), and sensors are always insulated (Fig. 2).…”

Section: Site Searchmentioning

confidence: 99%

Swiss-AlpArray temporary broadband seismic stations deployment and noise characterization

et al. 2016

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Abstract. AlpArray is a large collaborative seismological project in Europe that includes more than 50 research institutes and seismological observatories. At the heart of the project is the collection of top-quality seismological data from a dense network of broadband temporary seismic stations, in compliment to the existing permanent networks, that ensures a homogeneous station coverage of the greater Alpine region. This Alp Array Seismic Network (AASN) began operation in January 2016 and will have a duration of at least 2 years. In this work we report the Swiss contribution to the AASN, we concentrate on the site selection process, our methods for stations installation, data quality and data management. We deployed 27 temporary broadband stations equipped with STS-2 and Trillium Compact 120 s sensors.The deployment and maintenance of the temporary stations across 5 countries is managed by ETH Zurich and it is the result of a fruitful collaboration between five institutes in Europe.

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Improvement of broadband seismic station installations at the Observatoire de Grenoble (OSUG) seismic network

Cited by 3 publications

References 8 publications

Significant technical advances in broadband seismic stations in the Lesser Antilles

Significant technical advances in broadband seismic stations in the Lesser Antilles

Unprecedented seismic swarm in the Maurienne valley (2017–2019) observed by the SISmalp Alpine seismic network: operational monitoring and management

Swiss-AlpArray temporary broadband seismic stations deployment and noise characterization

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