The Committee on Solid Earth Geophysics (COSEG) provides independent advice to all levels of government and society on scientific, technical, and policy matters related to seismology, geodesy, and geodynamics.

Members are drawn from the public, academic, and private sectors and have a broad range of expertise and experience. The mission of the committee is as follows:

• To foster and encourage understanding of the structure, dynamics, and evolution of the Earth.
• To review and define basic and applied research activities in seismology, geodesy and geodynamics that contribute to federal agency missions.
• To address the transfer of seismological and geody­namics knowledge to areas of public welfare and national need including topics such as earthquake science; geological hazards; energy, mineral, and water resources; national security, global climate change; land-use planning; and public education.
• To foster long-term national efforts to collect, store and openly disseminate seismological, geodetic, and geodynamical data of all types.
• To foster long-term national efforts to monitor geodynamical events as well as nuclear testing treaties using geophysical technologies.
• To serve as the U.S. member of the International Lithosphere Program.

COSEG, formerly the Committee on Seismology and Geodynamics (name changed June 2020), was formed in 2001 as a standing committee of the Board on Earth Sciences and Resources. This committee succeeded three former entities: the Committee on Seismology, the U.S. Geodynamics Committee, and the Committee on Geodesy.