Aerial view looking northeast along the Totschunda fault rupture. The offset channel at site HS-557 is visible at the top of the photo. At that location there was right-lateral offset of 2.8 +/- 0.2m and a vertical displacement of 0.45 +/- 0.15m, up to the north. The combined offset of the 2002 and penultimate earthquakes was measured at 5.8 +/- 0.5m. Site HS-557, km 249.92. Photo by P. Haeussler.
D. Schwartz pointing to a buried organic horizon exposed along the Totschunda fault trace. An offset channel within a few meters showed extension and a right-lateral offset of 2.8 +/- 0.2m and a vertical displacement of 0.45 +/- 0.15m, up to the north for the 2002 event. A paleo-offset here revealed previous fault slip for a combined total of 5.8 +/- 0.5m, right-lateral. The buried organic horizon was also offset in the penultimate event. Site HS-557, km 249.92. Photo by P. Haeussler.
View to the west of an offset channel along the Totschunda rupture. There was extension across the 2.5-m-wide rupture zone, resulting in the formation of a graben. Right-lateral offset was 2.8 +/- 0.2m with a displacement of 0.45 +/- 0.15m, up to the north. The white rod and tape define a channel margin offset by the 2002 and penultimate events. Total slip is 5.8 +/- 0.5m, right-lateral. Site HS-557, km 249.92. Photo by P. Haeussler.
View to the west of an offset channel along the Totschunda rupture. Right-lateral offset was 2.8-3.0m with a vertical displacement of 0.45 +/- 0.15m, up to the north. This site also provided information on the amount of slip during the penultimate event. Site HS-557, km 249.92. Photo by P. Haeussler.
Aerial view south of multiple offset channel margins along the Totschunda fault. Black arrows point to the offset from the 2002 event and the white arrows show displacement from two events. Site HS-557, km 249.92. Photo by D. Schwartz.