Fig. 6: Dust speed controlled by fracture aperture.
From: Probing complex geophysical geometries with chattering dust

a The false-color image of the actual fractures with yellow-orange dots indicating the location of the chattering dust during descent, (see Supplementary Fig. 8c for dimensions.) Location of chattering dust grains as a function of time from video imaging (blue diamonds) and acoustic emission (AE open red circles) are shown for b converging Y-shaped aperture, c diverging (inverted Y) aperture, d diamond chain, and e narrowing-aperture fracture (converging). Out-of-plane aperture was 2 mm in all cases.