This work presents a simulation framework for enhancing Earthquake Early Warning Systems (EEWS) through the use of optical fiber networks as seismic sensors. The primary objective is to improve the detection and characterization of seismic events by leveraging changes in the state of polarization (SOP) of light signals propagating through optical fibers affected by seismic-induced strain. This research aims to provide timely alerts that could help safeguard cities before the earthquake's impact by developing a more accurate and comprehensive model of fiber optic behavior during seismic events. The proposed framework integrates a new modeling approach that combines realistic strain propagation along fiber lines with a detailed waveplate model to account for the effects of birefringence and polarization changes.