Shear Image (IMAGE)

Penn State

Shear Image

Caption

Scanning electron microscope images of laboratory fault zone showing sense of shear (white arrows) and zones of localized shear. Slow stick-slip is thought to originate when failure begins on one of these surfaces, but is partially arrested as slip velocity increases and the friction behavior changes from potentially unstable, velocity weakening frictional behavior to stable, velocity strengthening frictional behavior.

Credit

Haines, S. H.; Kaproth, B.; Marone, C.; Saffer, D. and B. A. van der Pluijm

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