A trans-dimensional disturbance was an astronomical phenomenon in the Delphic Expanse. These phenomena were created by the Sphere-Builders as a prelude to invasion. The space within the disturbance was reconfigured, gradually at first. Such a disturbance was essentially a convergence of spatial anomalies, which were very common in the Expanse, created by spheres in that region. A trans-dimensional disturbance was also an unusually strong type of gravimetric disturbance and generated gravimetric waves. It contained elevated levels of ammonium sulfide. Usually, inside a developed trans-dimensional disturbance, the atmosphere had an auburn hue and light-smears often appeared in mid-air. Helmsman Travis Mayweather once likened a trans-dimensional disturbance to soup.