<p>This article investigates the Love wave propagation along an irregular interface between a porous layer, saturated with two immiscible fluids, and an initially stressed elastic half-space under gravity. The interface irregularity is modeled as a triangular depression in the half-space. A complex transcendental dispersion relation is derived, linking the Love wave’s frequency and phase speed. The study also compares this model with cases involving rectangular, parabolic, and localized sinusoidal irregularities, and the dispersion equation is reduced to simpler previously established forms. Numerical investigation explores the influence of material properties, interface irregularity, and fluid saturation on wave behavior, demonstrating that the triangular pit, porosity, and attenuation coefficient significantly affect phase speed. The results, presented graphically, provide deeper insights into Love wave propagation in this complex system.</p>