On November 12th 2017, the largest earthquake (Mw 7.3) ever recorded in the Zagros mountains occurred near the town of Sarpol-Zahab, Iran. While this region encompasses clusters of giant ancient rockslides, this seismic event is an excellent case-study to decipher the controlling factors of earthquake-induced landslides. Here, we address this issue by deriving an original earthquake-induced landslide inventory, encompassing landslides of various velocities (from rapid rockfalls to slow-moving landslides). This inventory displays clear differences in the spatial and volumetric distributions of earthquake-induced landslides, with 360 rockfalls triggered around the epicenter, and 9 giant active and ancient rockslides coseismically accelerated at locations up to 180 km from the epicenter. This distant triggering is explained by the earthquake source properties coupled with the local geological conditions. Our study documents a rare example of slow-moving landslides accelerated by an earthquake, and opens perspectives for the study of the landslide triggering over various time-scales.

Surface displacement data from earthquakes are essential for characterizing the fault slip distribution with depth. The Hebgen Lake earthquake was a large normal event with a geometrically complex surface rupture, which broke across mountainous terrain. This study takes advantage of high-resolution historical stereo-imagery to measure the vertical and horizontal displacement from correlation of the orthorectified pre- and post-earthquake image mosaics. The results reveal new strike-slip surface ruptures which are possibly associated with the aftershocks from 18\textsuperscript{th} August 1959. The kinematic role of these structures is likely related to the accommodation of internal deformation induced by the mainshock strain field. Additionally, the comparison of our results with the existing displacement data shows that the OIC-derived offsets often exceed the field measurements by $>$50\%. We attribute this difference to the inelastic damage accommodated off the main rupture.

The shallow 1971 Mw 6.6 San Fernando, California earthquake involved a complex rupture process on an immature thrust fault with a non-planar geometry, and is notable for having a higher component of left-lateral surface slip than expected from seismic models. We extract its 3-D coseismic surface displacement field from aerial stereo photographs and document the amount and width of the vertical and strike-parallel components of distributed deformation along strike. The results confirm the significant left-lateral surface offsets, suggesting a slip vector rotation at shallow depths. Comparing our offsets against field measurements of fault slip, we observe that most of the offset was accommodated in the damage zone, with off-fault deformation averaging 68% in both the strike-parallel and vertical components. However, the magnitude and width of off-fault deformation behave differently between the vertical and strike-parallel components, which, along with the rotation in rake near the surface, can be explained by dynamic rupture effects.