  Coronal mass ejections (CMEs) and other solar eruptive phenomena can be
physically linked by combining data from a multitude of ground-based and
space-based instruments alongside models, however this can be challenging for
automated operational systems. The EU Framework Package 7 HELCATS project
provides catalogues of CME observations and properties from the Helio- spheric
Imagers onboard the two NASA/STEREO spacecraft in order to track the evolution
of CMEs in the inner heliosphere. From the main HICAT catalogue of over 2,000
CME detections, an automated algorithm has been developed to connect the CMEs
observed by STEREO to any corresponding solar flares and active region (AR)
sources on the solar surface. CME kinematic properties, such as speed and
angular width, are compared with AR magnetic field properties, such as magnetic
flux, area, and neutral line characteristics. The resulting LOWCAT catalogue is
also compared to the extensive AR property database created by the EU Horizon
2020 FLARECAST project, which provides more complex magnetic field parameters
derived from vector magnetograms. Initial statistical analysis has been
undertaken on the new data to provide insight into the link between flare and
CME events, and characteristics of eruptive ARs. Warning thresholds determined
from analysis of the evolution of these parameters is shown to be a useful
output for operational space weather purposes. Parameters of particular
interest for further analysis include total unsigned flux, vertical current,
and current helicity. The automated method developed to create the LOWCAT
catalogue may also be useful for future efforts to develop operational CME
forecasting.
