These tools have included magnetic, electric, hydrogeologic and seismic instruments. Seismic experiments have included multipleship efforts and long term deployments. These experiments are important for studying earthquake hazards, the influence of seismic activity on crustal hydrogeology, and the structure, physical state and composition of Earth.
Seismic interpretation is enhanced by a knowledge of elastic properties from borehole logs.
A seafloor recording package was later deployed so that natural seismicity could be monitored over an extended period of time. This long-term experiment will yield information on the local seismic structure of the crust and also on the deep structure of the mantle. Seismology is just one if the areas in which ODP is collaborating with other geoscience programs to make the most efficient use of resources.