Author(s)

K.F. Mobley

Abstract

Development on an earthquake induced landslide K.F. Mobley Shannon and Wilson Inc., Anchorage, Alaska, USA ABSTRACT In 1964, a strong motion seismic event struck south-central Alaska causing wide spread damage in the region. In Anchorage, located about 140 km from the epicenter, several large landslides occurred. Immediately following the quake, studies were conducted on all of the slides to determine their mode of failure, and stability. Since then, long term strength improvements in the moderately sensitive clays coupled with the buttressing effect of the slide mass have increased the stability of the slides. The Turnagain landslide was the largest and most destructive of the slides in the Anchorage area. About 70 homes were lost and several people killed. The slide extended about 2400 meters along the coast line and retreated about 180 meters inland. A portion of the slide was developed as a park, with the previously developed

Keywords