AbstractWhistlers observed outside the plasmasphere by Cluster have been correlated with the global plasmasphere using Imager for Magnetopause‐to‐Aurora Global Exploration‐Extreme Ultraviolet Imager (IMAGE‐EUV) observations. Of the 12 Cluster‐observed whistler events reported, EUV is able to provide global imaging of the plasmasphere for every event and demonstrates a direct correlation between the detection of lightning‐generated whistlers beyond the plasmapause and the presence of a global perturbation of the local plasmapause. Of these 12 correlated events, seven of the Cluster‐observed whistlers (or 58%) are associated with the Cluster spacecraft lying radially outward from a plasmaspheric notch. Two of the Cluster‐observed whistlers (17%) are associated with the low‐density region between the late afternoon plasmapause and the western wall of a plasmaspheric drainage plume. The final three Cluster‐observed whistler events (25%) are associated with a nonradial, nonazimuthal depletion in plasmaspheric He+ emission that are termed “notch‐like” crenulations. In one of these cases, the notch‐like crenulations appear to be manifestations entrained within the plasmasphere boundary layer of a standing wave on the surface of the plasmasphere. The correlated Cluster/IMAGE‐EUV observations suggest that the depleted flux tubes that connect the ionosphere to the low‐density regions of plasmaspheric trough and inner magnetosphere facilitate the escape of whistler waves from the plasmasphere.