Hanning Bay fault scarp on Montague Island, looking northwest. Vertical displacement in the foreground, in rock, is about 12 feet. The maximum measured displacement of 14 feet is at the beach ridge near the trees in the background.
The zone of fresh earth and landslide at the foot of this hillside on Montague Island marks the southwest trending Patton Bay fault, which was reactivated during the earthquake. The northwest side of this vertical fault (on the left) was displaced upward as much as 8 feet with respect to the southeast side. There was, in addition, 9 feet of associated up warping of the upthrown (northwest) block, so that total vertical displacement across the entire fault zone was 17 feet. The view is northeast.
Open fissures formed in bedrock adjacent to the Hanning Bay and Patton Bay faults during the earthquake. The fissures generally trended at high angles to the faults and were as wide as half a foot and as long as a few hundred feet. The fissures shown here opened about 1.5 inches.
Tsunami damage at Seward. The waves came in from the sea via Resurrection Bay in the background.
Compare the damage sustained by the Hillside Apartment Building and the adjacent three-story wood-frame dwelling with the tall chimney. In general, wood frame buildings in Anchorage sustained little damage from seismic vibration.