Investigating the Origins and Heliospheric Evolution of Homologous CMEs Originating from NOAA AR11093 on 7 and 14 August 2010

Details Investigating the Origins and Heliospheric Evolution of Homologous CMEs Originating from NOAA AR11093 on 7 and 14 August 2010 Investigating the Origins and Heliospheric Evolution of Homologous CMEs Originating from NOAA AR11093 on 7 and 14 August 2010

Dec 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011agufmsh23c1974s&link_type=abstract

American Geophysical Union, Fall Meeting 2011, abstract #SH23C-1974

Astronomy and Astrophysics

Astrophysics

[2101] Interplanetary Physics / Coronal Mass Ejections, [2111] Interplanetary Physics / Ejecta, Driver Gases, And Magnetic Clouds, [7513] Solar Physics, Astrophysics, And Astronomy / Coronal Mass Ejections

Scientific paper

The relative positions of STEREO, SDO and Venus Express in August 2010 provide an opportunity for unique multi-spacecraft observations of homologous CMEs. On 7 August 2010, a halo CME originating from NOAA AR11093 is observed remotely by STEREO B. Seven days later this active region erupts again, and a halo CME is observed remotely by STEREO A on 14 August 2010. We show that both eruptions are associated with reverse S-shaped flux rope structures and display a number of typical large-scale features related to CMEs, including coronal dimmings and EUV waves. By combining remote sensing and textit{in situ} observations of the ejecta, we consider the structure and heliospheric evolution of these CMEs and their interplanetary counterparts. Next, we compare and contrast these two eruptions, with a view to discussing the implications of the similarities and differences between the ejecta.

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