This two-volume set serves as a comprehensive reference work designed to define and explain the fundamental principles, terminology, and research methodologies within the fields of seismology and geomagnetism. Edited by S. K. Runcorn, a prominent figure in the study of planetary physics, the work compiles contributions from various experts to provide a structured overview of geophysical phenomena. It functions as a technical resource for researchers and students seeking to understand the physical properties of the Earth and its magnetic field.

Experts recognize this dictionary as a foundational reference for historical geophysical research and terminology. Readers frequently note the academic density of the prose, which is tailored specifically for professionals and advanced students in the earth sciences.