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Radio evidence for a shock wave reflected by a coronal hole

Bemporad, A.; Frassati, F.; Giordano, S. +4 more

We report the first unambiguous observational evidence in the radio range of the reflection of a coronal shock wave at the boundary of a coronal hole. The event occurred above an active region located at the northwest limb of the Sun and was characterized by an eruptive prominence and an extreme-ultraviolet wave steepening into a shock. The EUV ob…