Regional tsunami hazard assessment for Shemya, Alaska

Description

We assess potential tsunami hazards for Eareckson Air Station on Shemya Island, Alaska. The primary tsunami hazard for this installation is considered to be near-field, with the major threat originating from tsunamigenic earthquakes along the Alaska-Aleutian megathrust. We numerically model tsunamis generated by three different megathrust earthquakes, analyze tsunami wave dynamics, and develop approximate tsunami hazard maps for Eareckson Air Station (formerly "Shemya Station"). The hypothetical tsunami scenarios that we examined simulate Mw9.0 megathrust earthquakes with a slip distribution in the 5-54 km (3-33 mi) depth range along the Alaska-Aleutian megathrust. The maximum runup heights are 40 m (131 ft) on the northern side of Shemya Island, and 58 m (190 ft) on the southern side of the island. Results presented here are intended to provide guidance to local emergency management agencies in initial tsunami inundation assessment, evacuation planning, and public education for mitigation of future tsunami hazards. The complete report and digital data are available from the DGGS website: http://doi.org/10.14509/30193.

Resources

Name Format Description Link
0 http://doi.org/10.14509/30192
0 http://doi.org/10.14509/29565
0 http://doi.org/10.14509/29414
0 http://doi.org/10.14509/29126
0 http://doi.org/10.14509/29674
0 http://doi.org/10.14509/29675
0 http://doi.org/10.14509/29706
0 CSDGM IMPORT ERROR: No digtinfo/formcont http://doi.org/10.14509/30193
0 http://doi.org/10.14509/29740
0 http://doi.org/10.14509/30186
0 http://doi.org/10.14509/30193
0 http://doi.org/10.14509/21001

Tags

  • engineering
  • aleutian islands
  • tectonics
  • bathymetry
  • faults
  • geologic
  • uplift
  • engineering geology
  • coastal
  • subsidence
  • earthquake
  • flood
  • geotechnical
  • water
  • subduction
  • geological process
  • landslide
  • hazards
  • surface
  • tsunami
  • geologic hazards
  • shemya

Topics

  • Local Government

Categories