Following the severe damage to the mountain settlement of La Bérarde (French Alps), which was struck by a flood and debris flow in June 2024, we conducted a helicopter-based GPR survey of the upstream Glacier de la Bonne Pierre. The survey aimed to investigate whether the glacier—particularly the water stored within it—may have influenced the dynamics of the flood.

Here, we present preliminary results from an extensive GPR survey conducted in November 2024 using the Airborne Ice Radar of ETH Zürich (AIRETH). Notably, we discuss peculiar signal reflections observed in the acquired radargrams. Whether the features can actually be interpreted as traces of an englacial reservoir is not clear yet, and we thus hope that AGM can provide a platform for discussing different interpretations.