Authors: Chris Jia (Stanford University), Aimee Norton (Stanford University)

We study the flux emergence of active regions from 10^20-10^23 Mx and correlated their flux emergence rate with various parameters that relate to twist, buoyancy and velocity to determine what influences the scatter in observed rates. The substantial scatter in observed emergence rates may provide a diagnostic of variations in subsurface magnetic structure, including twist, buoyancy, geometry, and interactions with convective flows. Maximum, instantaneous flux emergence rates show less scatter than average flux emergence rates when plotted as a function of maximum flux ultimately emerged. The maximum flux emergence rates were not found to be concentrated at any exact time, early or late for example, during the emergence events. We did not find any correlations with common measures that could relate the flux emergence rates to flux tube twist or curvature, i.e. alpha, tilt, pivot angle, etc. The maximum umbral B_r field values of the ARs do correlate positively with flux emergence rates which may be an indication that buoyancy plays a role. We look at whether the rise speeds observed along the strong horizontal fields in between the footpoints, i.e. the horizontal tops of the flux tubes during emergence, vary with the ARs to see if velocity is determining the rates.