  In our earlier study of this series (Park et al. 2020, Paper I), we examined
the hemispheric sign preference (HSP) of magnetic helicity flux $dH/dt$ across
photospheric surfaces of 4802 samples of 1105 unique active regions (ARs)
observed during solar cycle 24. Here, we investigate any association of the
HSP, expressed as a degree of compliance, with flaring activity, analyzing the
same set of $dH/dt$ estimates as used in Paper I. The AR samples under
investigation are assigned to heliographic regions (HRs) defined in the
Carrington longitude-latitude plane with a grid spacing of 45$^\circ$ in
longitude and 15$^\circ$ in latitude. For AR samples in each of the defined
HRs, we calculate the degree of HSP compliance and the average soft X-ray flare
index. The strongest flaring activity is found to be in one distinctive HR with
an extremely low HSP compliance of 41% as compared to the mean and standard
deviation of 62% and 7%, respectively, over all HRs. This sole HR shows an
anti-HSP (i.e., less than 50%) and includes the highly flare-productive AR NOAA
12673, however this AR is not uniquely responsible for the HR's low HSP. We
also find that all HRs with the highest flaring activity are located in the
southern hemisphere, and they tend to have lower degrees of HSP compliance.
These findings point to the presence of localized regions of the convection
zone with enhanced turbulence, imparting a greater magnetic complexity and a
higher flaring rate to some rising magnetic flux tubes.
