The objective of the EMECHAT campaign was to use high-resolution seismic reflection to add a new vertical dimension to the understanding of the seismo-tectonic pattern of the Nord-Cotentin region. At the north-western tip of the Cotentin peninsula (La Hague), which has a singular geological history and evolution spanning 2 billion years, and at the same time moderate seismic activity, the aim was to gain a better understanding of the interaction between this polygenic structure (structural heritage), sedimentary processes and past and recent tectonic movements (potential activity of some Cotentin faults).

The team's work has made it possible to establish

1. a high-resolution DTM,
2. an onshore setting and
3. a new geological map (figure).

The EMECHAT campaign carried out in June 2022 successfully collected data that should provide a new understanding of this area in the vertical dimension. To achieve this objective, the 450 miles of multi-trace seismic (MTS) plate 48 traces must be processed (Figure). While some of the initial results will be integrated into the ongoing PhD thesis of Tassadit Kaci (ULHN), the processing will be part of an M2 internship, two "Intechmer" student internships, and potentially part of a larger thesis on the Channel trenches and its seismo-tectonic evolution.