Fig. 4: Normal versus tangential displacements.
From: Signatures of the sub-Rayleigh to supershear fracture transition in snow avalanche experiments

Relative normal displacement Δw with relative tangential displacement Δu (relative displacement of the forming crack faces) for close-ups #1 (blue) and #2 (red), highlighting two different deformation mechanisms. Inset: the same plot is displayed with both x- and y-axis limits extended to larger maximum values, preserving the aspect ratio.