Artists impression of the twin STEREO satellites

The Heliospheric Imager for the NASA STEREO Mission

Part of the SECCHI Consortium

The first comprehensive catalogue of CMEs in the heliosphere

Harrison et al. 2018, Solar Phys. 293, 77, 10.1007/s11207-018-1297-2 present, and analyse, the first catalogue of heliospheric CMEs based on STEREO/HI-1 imagery. The authors present distributions of the basic observational CME parameters – namely occurrence frequency, central PA and PA span – from over 2000 CME detections over the majority of solar cycle 24 (April 2007 to August 2017). These distributions are compared to those of CMEs at coronal altitudes, and sunspot number, providing valuable insights to the launch and propagation of CMEs.

Analysis was based on the HICAT catalogue, which was generated within the EU FP7 HELCATS project.

hicat cmes — Histogram of daily-average rates of HICAT CMEs detected by (a) STEREO/HI-1A and (b) STEREO/HI-1B compared to coronal CME rates from (c) STEREO/COR-2A and (d) STEREO/COR-2B and (e) SOHO/LASCO. Panel f shows the monthly sunspot count over the same period.