Surface icequakes and basal stick-slip events reveal daily grounding line migration and seawater intrusion at a marine-terminating glacier in East Antarctica
Year: 2026

Abstract. As they reach the ocean, Antarctic outlet glaciers transition from grounded to floating at their so-called grounding lines (GL). This transition is known to be mechanically controlled by tides, which induce ice flexure visible at the surface from satellite and ground geodesy and often used as a proxy for grounding line position. Here, we use a dense seismic node array to study the spatial and temporal dynamics of surface, crevasse-induced icequake activity and basal, sliding-induced se