CDD - Geophysicist M - F H/F

Ifremer; Coat Salou; Remote; EUR 42,000 - 64,000; Full time

Benefits offered by this job

Remote work possible

12 RTT days

Skills development budget

CSR policy

Job summary

Ifremer à Plouzané (Bretagne) recherche un(e) doctorant(e) pour intégrer l’équipe des Hazards marins dans le cadre du projet CAST financé par l’ANR. Vous utiliserez des données sismologiques passives pour détecter et localiser des séismes, estimer leurs magnitudes et analyser le déclenchement des séismes afin d’éclairer les risques sismiques et tsunami dans la région Caraïbe.

Vous collaborerez avec le CNRS, l’UBO et d’autres partenaires; vous publierez vos résultats et co-rédigerez un manuscrit.

Qualifications

• Doctorat (PhD) ou diplôme équivalent en géophysique, sciences de la Terre ou physique.
• Expérience en détection et localisation de séismes et estimation de magnitudes (séismologie passive).
• Compétences avancées en Python.
• Capacité à interagir au sein d’un projet CAST et à communiquer scientifiquement.

Responsibilities

• Pré-traitement des données sismologiques passives et détection/ localisation des événements.
• Estimation des magnitudes et détermination des mécanismes focaux si possible.
• Intégration des nouvelles séismes avec les catalogues existants pour interprétation.
• Co-auteur d’un manuscrit scientifique et résultats publiables.
• Suivi scientifique régulier avec le directeur scientifique et adaptation des axes du projet CAST.

Skills

Correlation sismologique

Détection, localisation & magnitudes

Python avancé

Education

Doctorat / PhD en Géophysique / Sciences de la Terre / Physique

Job description

Les missions du poste

Join Ifremer, an ally of planetary well-being, to gain a better understanding of and better protection for the ocean.

From the abyss to the surface, from the coast to the open SEA, Ifremer is the French research institute that is wholly dedicated to the Ocean. Its teams carry out research, innovate and produce expert reports to protect the ocean, exploit its resources in a responsible manner and shares marine data.

Ifremer contributes its scientific expertise to throw light on public policies and develops solutions drawn from the ocean to meet the challenges of the ecological transition. Ifremer is the operator of France's oceanographic fleet with its shipbuilding subsidiary Genavir, and imagines, designs and deploys leading edge technological means to solve the ocean's mysteries.

Join our teams, made up of 1500 scientists and research support staff, present all along the coastal areas of France and French overseas territories.

www.ifremer.fr

Closing date for applications : 13/11/2026

Who We Are ?The Marine Hazards team (ALéas MArins, ALMA) of the Geo-Ocean Laboratory (UMR 6538) in Plouzané France develops measures, promotes new approaches, and conceives models that explain the causes, consequences, the recurrence, and the impact of geological hazards in the marine domain. The Marine Hazards team is comprised of international members within several institutions: Ifremer, CNRS, and University of Western Brittany (UBO). Within the Marine Hazards team, we have several large-scale research initiatives that address major scientific challenges such as characterizing tectonics and past and present seismic sources, active volcano monitoring, the installation of long-term seafloor observatories, characterizing submarine landslides, modeling sediment behavior, and even investigate the pathways of methane from how it leaves sediments and enters the hydrosphere and the atmosphere. Through these activities, we mobilize communities at the national and international levels. The candidate will be placed under the management of Stéphan KER, the Marine Hazards team leader. The scientific director will be Chastity AIKEN, seismologist in the Marine Hazards team.

What Will Your Role and Responsibilities Be?

This position is part of the CAST project, financed by the Agence Nationale de Recherche. The CAST project aims to understand the evolution of major strike-slip faults - the Septentrional-Oriente Fault and Enriquillo-Plantain Garden Fault - surrounding Haiti in the North Caribbean. The objectives are to improve our understanding of how these faults generate earthquakes and potentially tsunamis, and therefore how to better assess the seismic and tsunami risks in the region.

The Septentrional-Oriente Fault Zone (SOFZ), proposed to be the northern limit of the Gonâve microplate in the Caribbean Sea, is an active strike-slip fault. The SOFZ in northern Haiti is located offshore in a zone of thrust deformation. Since 1842, a few magnitude greater than 7 earthquakes have been recorded near the SOFZ and at least one tsunami, but the strongest magnitude earthquakes occurring in northern Haiti or the Dominican Republic are not necessarily earthquakes produced by the SOFZ. To better understand the seismic and tsunami risks, passive broadband seismological data was collected in the Windward Passage. Five broadband ocean-bottom seismometers were deployed between July 2024 and February 2025, and 4 were deployed and recovered between February 2025 and February 2026.

The candidate will address the following question in the context of historical seismicity: How is the seismicity linked to the SOFZ fault structure and how does the fault release its stress seismically (slowly or fast) ? You will use passive broadband seismological data to 1) detect and locate seismicity - earthquakes and/or tremors, 2) determine how the fault releases its stress, and 3) connect present day seismicity directly to the known fault structures to elucidate the depth of the seismogenic zone. Identifying the depth of the seismogenic zone is important because it is one of the important elements needed to characterize the seismic and tsunami risks. The results obtained in the framework of this position will complete databases for seismic hazard models in the Caribbean region.

What Will Your Main Responsibilities Be?

• Pre-treatment of passive seismological data, including noise correlation for time correction.
• Detection, location, and magnitude estimation of earthquakes and/or tremors.
• Determination of focal mechanisms, if possible.
• Integration of newly detected seismicity with known earthquake catalogs for interpretation.
• Co-author of a scientific manuscript.

The candidate will be responsible for the implementation of this task within the CAST project, the choice and adaptation of analytical methods as well as the interpretation of the results. Weekly scientific follow-ups with scientific director will take place throughout the contract term, to provide an opportunity to discuss progress, to adjuster project guidelines, and resolve difficulties encountered. This organization aims to assure a scientific exchange close and constructive while promoting autonomy for the candidate to carry out his/her/their work. More frequent exchanges could be organized during key phases of the project or as key deadlines approach.

Key Relationships

• Internal : Interactions with the Marine Hazards team, the Mixed Research Unit Geo-Ocean and with the IT department
• External : Work conducted in collaboration with partners in the CAST project.

Le profil recherché

Who Are You? Diploma : A doctorate (PhD), engineering degree, or a Master's degree in the domain of Geophysics, Earth Sciences, or Physics. Experience :

• Research experience or significant technique (thesis, post-doctoral fellowship, or long-term end of studies internship) applied to the detection and location of earthquakes (passive seismology, data treatment, or seismic monitoring).
• Practical experience in the use of standard software, algorithms, and routines for the treatment of passive seismological data, phase picking, and the detection and location of seismic events.
• Complementary experience in noise correlation of passive seismological data would be a real plus.
• Experience in scientific validation (publication, communication) or detailed technical report writing.

You have the following skills, knowledge and experience:

• Experience with correlation of seismological data
• Experience with the detection, location, and magnitude estimation of seismicity
• Advanced programming skills with Python

You have the following qualities:

• Capacity to interact with others in the CAST project
• Intellectual curiosity and a critical mind
• Strong organizational skills and attention to detail.
• Capacity to work efficiently within a team and work with others
• Good scientific communication skills (writing and speaking)
• Master of essential scientific English

Bienvenue chez Ifremer

Join Ifremer, an ally of planetary well-being, to gain a better understanding of and better protection for the ocean. From the abyss to the surface, from the coast to the open SEA, Ifremer is the French research institute that is wholly dedicated to the Ocean. Its teams carry out research, innovate and produce expert reports to protect the ocean, exploit its resources in a responsible manner and shares marine data. Ifremer contributes its scientific expertise to throw light on public policies and develops solutions drawn from the ocean to meet the challenges of the ecological transition. Ifremer is the operator of France's oceanographic fleet with its shipbuilding subsidiary Genavir, and imagines, designs and deploys leading edge technological means to solve the ocean's mysteries. Join our teams, made up of 1500 scientists and research support staff, present all along the coastal areas of France and French overseas territories. www.ifremer.fr

Mais aussi...

• Remote working subject to agreement.
• Our staff are entitled to 12 days of RTT and additional leave beyond statutory entitlements.
• We allocate a substantial budget to skills development, through individual and team-based initiatives.
• We are committed to a CSR policy inspired by the institute's core values (sustainable mobility allowance, etc.)