Space weather causes geomagnetic disturbances that can affect critical infrastructure. Understanding the dynamic response of the coupled solar wind-magnetosphere-ionosphere system to severe space weather is essential to national security and economy. Auroral phenomena, such as substorms, streamers, omega bands, and more, are the major drivers of the most intense geomagnetic field variations, which cause large geomagnetically induced currents (GICs). In this study, we investigate the characteristics of supersubstorms and how these events relate to geomagnetic perturbations at mid-latitudes. More than 30 instances of superMAG index SML <-2500 nT, a level considered for supersubstorms, have been identified. We focus of four events with good or some auroral images around the possible source of the large electrojet. Auroral images show that they are commonly associated with large auroral brightening, likely poleward boundary intensifications, while the Spherical Elementary Current Systems techniques depicts strong ionospheric currents patterns. Furthermore, we consider the related geomagnetic perturbations on the ground by comparing the patterns during supersubstorms and regular substorm intervals, and how they affect level of GICs at mid-latitudes.