Restricted propagation of an “EIT wave” in the low solar corona

E-ISSN： 1743-9221|11|S320|98-102

ISSN： 1743-9213

Source： Proceedings of the International Astronomical Union, Vol.11, Iss.S320, 2016-09, pp. : 98-102

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Abstract

We present observations of an “EIT wave” associated with an X-class flare from 2012 July 6, the propagation of which was severely restricted by the magnetic structure of the solar corona surrounding the erupting active region. The “EIT wave” was observed by both SDO and STEREO-A, allowing a three-dimensional examination of how the propagation of the disturbance was affected both by a neighbouring coronal hole and a trans-equatorial loop system. In addition, the eruption was observed at the limb by the ground-based CoMP instrument, allowing the Doppler motion associated with the eruption and resulting coronal loop oscillation to be investigated in detail. This combination of data-sets provides a unique insight into the three-dimensional evolution of the “EIT wave” and its effects on the surrounding corona.