The National Science Foundation is inviting grant applications for basic research on the physics of the solid earth to explore its composition, structure, and processes. The program supports laboratory, field, theoretical, and computational studies. Topics include seismicity, seismic wave propagation, and the nature and occurrence of earthquakes; the earth's magnetic, gravity, and electrical fields; the earth's thermal structure; and geodynamics. Supported research also includes geophysical studies of active deformation, including geodesy, and studies of the properties and
behavior of earth materials in support of geophysical observation and theory.

DEADLINE: The full proposal submission windows are May 5 to June 5 and
November 5 to December 5.