Wave equation with a coloured stable noise

We define a random measure generated by a real anisotropic harmonizable fractional stable field $Z^H$ with stability parameter $\alpha \in (1,2)$ and Hurst index $H\in (1\mathrm{/}2,1)$ and prove that the measure is $\sigma$-additive in probability. An integral with respect to this measure is constructed, which enables us to consider a wave equation in ${\mathbb{R}}^3$ with a random source generated by $Z^H$. We show that the solution to this equation, given by Kirchhoff’s formula, has a modification, which is H"older continuous of any order up to $(3H-1)\wedge 1$. In the case where $H\in (2\mathrm{/}3,1)$, we show further that the modification is absolutely continuous.