This presentation gives an overview of the ACT3 SHARP Storage project (Stress history and reservoir pressure for improved quantification of CO2 storage containment risks), introducing its ongoing seismological activities. This includes building a new earthquake catalogue for the North Sea area and designing improved seismic monitoring schemes for CO2 storage sites using seismic networks, seismic arrays, and distributed acoustic sensing on fibre-optic cables. The SHARP Storage project was launched in late 2021 with the overall aim to increase accuracy of subsurface CO2 storage containment risk management through the improvement and integration of subsurface stress models, rock mechanical failure and seismicity observations. SHARP is collaboration between 16 research institutions and companies and is supported under the ACT3 call. ACT is an ERA NET Cofund, which is a tool established by the European Commission under the Horizon 2020 programme for research and innovation. More information on the SHARP Storage project is found at https://sharp-storage-act.eu/.@en