International Review of Applied Sciences

This paper introduces a theoretical framework for describing energy-density variations within the Earth using the Relativistic Radial Density Theory (RRDT). The proposed approach models the Earth as a radially structured system in which spatial variations of mass–energy density are linked to underlying geophysical processes. Starting from fundamental physical quantities, including Planck-scale parameters, a set of analytical relations is derived to describe the distribution of radial mass density and its potential temporal evolution. The framework further explores how localized perturbations in radial density fields may be associated with changes in the dynamical state of the lithosphere. In this context, a conceptual measurement scheme is outlined, combining conventional sensing (e.g., seismometers) with distributed or mobile platforms for multi-scale data acquisition. The presented model is intended as a hypothesis-generating theoretical construct rather than a validated predictive tool. Its purpose is to provide a formal basis for future investigations of energy-density anomalies in geophysical systems and to suggest directions for experimental validation and interdisciplinary research. Potential implications for seismic hazard assessment are discussed at a conceptual level.