Fig. 4

Hypocentral distance variations for amplitude level variance: exponential-type random media. Hypocentral distance variations for amplitude level variance in acoustic exponential-type random media with wavenumber values of π/4, π/2, π, 2π, and 4π km⁻¹. Stochastic parameters a = 1 km and ε = 0.03 are assumed. The dotted line indicates the saturation level where log-amplitude variance tends toward a constant