Images

At pass west of Delta River. Here there was roughly 5 m of offset. Note the push up in the background. There is permafrost at the bottom of the cracks.

View north along Richardson Highway where it was offset by the Denali fault. Trans Alaska Pipeline is in the background.

USGS and university geologists study the walls of a trench across a recently discovered strand of the Seattle fault.

The Landers fault (red lines at left) and the Hector Mine fault and its aftershocks (red lines and circles at right). The Hector Mine earthquake was a magnitude 7.1, and it produced thousands of aftershocks. 

Fault surface trace of the Hector Mine fault after the October 16, 1999 M7.1 rupture. (Photo by Katherine Kendrick, U.S. Geological Survey)

Hector Mine surface rupture after 1999 earthquake in southern California. 

Looking towards NW across Lavic Lake, rupture passing from lower right, stepping out toward upper left; NW end of the surface rupture is in the distance on the far side of Lavic Lake.

View right along the main rupture zone, and also visible is a subsidiary fracture from lower-right corner coalescing with the main break in the middle distance.

View downward onto vehicle tracks crossing the fault at a high angle. One can see 2.5 to 3.5 meeter right-lateral displacement of the tracks.

Subparallel breaks coalesce on face of hill (in shadow) and form a single rupture heading off to the upper left.

No description.

No description.

No description.

Fractures crossing a wash.

Fracture running along hillside in low-relief topography with offset gullies and tracks.

Ground view along surface rupture, showing the fracturing of the soil and how pieces have been pushed up within the fault zone.

Breaks cutting alluvium, nicely lit.

Fracture cutting across the countryside.

No description.

No description.

No description.