An earthquake of magnitude 4.5 was detected and located on 29 October 2015 at 00h37 UT (01h37 French local time). Its epicentre is located in Catalonia, approximately 43 km to the south-east of Perpignan. Seven aftershocks were detected in the hours which followed, the strongest being of magnitude 1.8.
The CEA's Military applications division (Direction des applications militaires, DAM) is involved in the fight against nuclear proliferation and terrorism, which includes contributing its expertise to the International Atomic Energy Agency (IAEA) and the Comprehensive nuclear Test-Ban Treaty Organization (CTBTO). This contribution to strategic programs is based on the expertise of the environmental assessment and monitoring Department (Département analyse, surveillance, environnement, DASE) in monitoring seismic events, detecting radionuclides, measuring atmospheric phenomena and designing sensors and related networks.