CHÈZE , Jérôme

This video illustrates the beginning of the work for the construction of the ENAUX station: construction of an access road for the crawler drill, casting of the slab for the electric bay and scientific instrumentation, handling of the crawler drill and fixing of the drill chuck.The ENAUX observation site is part of the French seismological and...

This video illustrates a technique for installing a seismological station in the field while drilling. The sensor is lowered into the tube using an azimuth trolley to ensure the correct orientation of the sensor and therefore the quality of the data collected.This observation site is part of the French seismological and geodetic network Résif,...

This video shows the installation of the seismic sensor in the borehole during the construction of the ENAUX station.The ENAUX observation site is part of the French seismological and geodetic network Résif, a national research infrastructure dedicated to the observation and understanding of the structure and dynamics of the Internal Earth....

International audience

Nous suivons la vie d'un puits Résif, depuis sa création, jusqu'à son sablage. Un comparatif des signaux est fait sur les puits Résif de l'OCA-Géoazur.

Over the past two years, several important actions have marked the operation of Résif stations by OCA-Géoazur. Among these activities, this poster presents the azimuth alignment of all Résif sensors, the installation of sensors in the Durance River stations using a new system of watertight tanks, the ISO, SAOF and PIAF stations and the...

In February 2018, the area around the locality of Saint Paul en Forêt (Eastern part of the hercynian Maures massif,south-eastern France) was struck by 3 earthquakes of ML 3, 3.5 and 2.9 within a few hours. Such seismic activityis quite unusual in this area that is considered to be stable and seismically quiet compared to the surroundingregions...

This poster presents the steps from the creation of Résif wells to their sanding, as well as a comparison of the signals from the OCA-Geoazur's Résif wells in the seismological stations BLAF (Entrevennes, 04), MLYF (Forcalquier, 04), TRIGF (Trigance, 83) and ARTF (Artigues, 83). This poster was presented during the Résif Scientific and...

Le poster articulé en 2 parties présentent l'impact de la tempête Alex sur la récupération des données, et aussi des signaux mesurés par diverses stations Résif (dont RAP) installées à proximité des vallées concernées.

Haiti lies in an area that regularly experiences destructive earthquakes, but monitoring has been limited due to economical and political situation. Recent projects using citizen-hosted seismometers, and a temporary deployment in response to the 2021 M7.4 earthquake have provided a wealth of seismic data. Still, the high noise levels recorded...

The development of low-cost Raspberry Shake (RS) seismological stations capable of providing scientifically relevantseismological information in near-real time has enabled a Haitian citizen network to be set up as part of a participatoryseismology experiment that Started in July 2019. This network currently operates 12 RS instruments. These are...

On August 2021, a Mw 7.2 earthquake struck Haiti's southern peninsula, eleven years after the devastating Mw 7 January 12, 2010 earthquake that occurred near Port au Prince. This large event, called the Nippes earthquake, has been recorded locally by the citizen network composed of low-cost raspberry shake stations. A precise analysis of the...

Abstract Seismic monitoring in Haiti is currently provided by a mixed network of low-cost Raspberry Shake (RS) seismic stations hosted by citizens, and short-period and broadband stations located mainly in neighboring countries. The level of earthquake detection is constantly improving for a better spatio-temporal distribution of seismicity as...

The 14 August 2021 Mw 7.2 Haiti earthquake struck a decade after the devastating 2010 event within the Enriquillo Plantain Garden Fault Zone in the Southern peninsula of Haiti. Space geodetic results show that the rupture is composed of both left-lateral strike-slip and thrust motion, similar to the 2010 rupture, but aftershock locations from a...

ABSTRACT The 14 August 2021 Mw 7.2 Haiti earthquake struck 11 yr after the devastating 2010 event within the Enriquillo Plantain Garden (EPG) fault zone in the Southern peninsula of Haiti. Space geodetic results show that the rupture is composed of both left-lateral strike-slip and thrust motion, similar to the 2010 rupture; but aftershock...

The Mw7.8 Pedernales earthquake is associated with the subduction of the Nazca Plate beneath the South American Plate. The mainshock caused many casualties and widespread damages across the Manabi province. The 150 km-long coseismic rupture area is found beneath the coastline, near 25 km depth. The rupture propagated southward and involved the...

Since July 2019, The Ayiti-seismes citizen network (ASCN) has been detecting and locating, in real time, earthquakes occurring in Haiti of magnitude ≥ 2.5. ASCN is based on both Seiscomp3 modules and Géoazur in-house software, and uses seismic signals from (1) low-cost, low-maintenance Raspberry Shake (RS) instruments installed in Haiti and (2)...