Phase 3, which will run until April 2024, is focused on determining natural seismicity in the planned CO 2 offshore injection site. The program included assessing the integration of offshore nodes that form part of existing permanent reservoir monitoring sensor arrays in the area. Phases 1 and 2 of HNET investigated onshore and offshore seismic monitoring instrumentation solutions, deploying a new onshore array (HNAR) on Holsnøy island north of Bergen. The company has made available the 3D velocity model from its 44,000-sq-km Northern Viking Graben multiclient seismic dataset and is working with other partners using this model to improve the accuracy of seismic events detected, as part of a future monitoring system. MASSY, France - CGG has joined Phase 3 of the HNET Horda Platform Region project to monitor background seismicity at the Northern Lights CO 2 storage project in the Norwegian North Sea.