  We examine correlations of energy density induced by initial state
fluctuations, which are localized in both transverse and longitudinal extent.
The hotspots are evolved according to hydrodynamics in a background which
includes radial flow. Two-point energy density correlations from these hotspots
are computed as a function of the difference in azimuthal angle and rapidity.
Such localized perturbations occur naturally in the theory of hydrodynamic
fluctuations and may provide insight into some features of the two-particle
correlation data from RHIC and the LHC.
