Fig. 4: Interpretation of deformed dike segments aligned with M7.1 surface rupture.

a Orthophoto⁵⁸ showing tonal lineaments subparallel to rupture, bracketed by yellow and red triangles, respectively. b Digital elevation model⁵⁸ showing narrow ridges that correspond to the tonal lineaments in (a), along with the clearly expressed rupture. c Subvertical outcrop exposure of one of the interpreted dikes, with pervasive anastomosing shear fractures. d Oblique southeast view of the interpreted dike located closest to the surface rupture, again with pervasive fracturing that transitions to an apparently pulverized texture with increasing proximity to the rupture. Hammer for scale. Location: 35.696488°, −117.547989° (see Fig. 2).