Current experiments searching for impulsive radio signals from highest-energy neutrinos (𝐸 >
1 EeV) in ice require a very high degree of radio-quietness. Even in very remote locations such as
the summit of Greenland, where RNO-G is currently being built, unwanted radio signals are being
picked up by the highly sensitive detector stations. Background rejection strategies for different
noise sources like thermal and anthropogenic radio signals are currently being developed. This
article focuses on the identification of triboelectric radio pulse emission recognised at multiple in-
ice radio experiments. During high wind periods (𝑣 > 8 − 10 m
s ), the top-most layer of light snow
is dragged along the surface, creating charges through triboelectricity, leading to an electrostatic
potential. Coronal discharge could explain the high number of radio events detected at each
station. In particular, this conference article documents the efforts to detect accompanying pulsed
acoustic signals from the coronal discharges to exclude so-called "wind events".