Delta-spot Properties Observed with HMI from 2011-2018

The theory has been promoted that delta-spots are formed by the kink instability acting on rising flux ropes. Delta-spots are especially interesting as they are responsible for the majority of explosive flares. We examine the photospheric properties of delta-spots observed with HMI between 2011-2018. During this time, 86% of the X-class flares were produced by active regions classified as deltas at some point during their disk crossing. We provide an initial examination of properties, such as rotation and flux emergence rates, of these regions and consider how these properties relate to their formation.