Tsunami inundation maps of Anchor Point, Kenai, Ninilchik, and Tyonek in Cook Inlet, Alaska

Description

Tsunami inundation maps of Anchor Point, Kenai, Ninilchik, and Tyonek in Cook Inlet, Alaska, Report of Investigation 2024-4, evaluates potential tsunami hazards for several communities in lower Cook Inlet, including Anchor Point, Kenai, Ninilchik, and Tyonek, by numerically modeling the extent of inundation from tsunami waves generated by hypothetical earthquakes. We define an updated suite of earthquakes--including Tohoku-style megathrust ruptures and other sources in the eastern part of the Alaska-Aleutian megathrust--to calculate vertical seafloor displacements and model resulting tsunami dynamics. A hypothetical earthquake spanning from Kodiak Island to Prince William Sound with maximum slip distributed between depths of 5 and 22 km (3.1 and 13.7 mi) results in worst-case tsunami inundation for all communities. If the tsunami arrives at high tide, the maximum predicted overland flow depths in the communities can reach up to 10 m (32.8 ft), and the currents could be as strong as 12 m/sec (23.4 knots). Dangerous wave activity is expected to last for more than 24 hours. Results presented here are intended to provide guidance to local emergency management agencies for tsunami inundation assessment, evacuation planning, and public education to mitigate future tsunami damage. The complete report and digital data are available from the DGGS website: http://doi.org/10.14509/31260.

Resources

Name Format Description Link
0 CSDGM IMPORT ERROR: No digtinfo/formcont https://doi.org/10.14509/31260
0 https://doi.org/10.14509/31260
0 https://doi.org/10.14509/29705
0 https://doi.org/10.14509/30953
0 https://doi.org/10.14509/30097
0 https://doi.org/10.14509/30144
0 https://doi.org/10.14509/30581
0 https://doi.org/10.14509/31018

Tags

  • loon lake
  • anchorage
  • pollard lake
  • bernice lake
  • bottleneck lakes
  • port nikiski
  • slikok creek
  • coastal and river
  • nikishka
  • engineering
  • seismic hazards
  • land subsidence
  • anchor point
  • inundation
  • tectonics
  • sports lake
  • salamatof beach
  • modeling
  • viapan lake
  • cohoe
  • quintin lake
  • wildwood
  • granroos creek
  • faults
  • earthquake related slope failure
  • holocene
  • geologic
  • dory creek
  • coal creek
  • cape ninilchik
  • environmental
  • kalifornsky beach
  • engineering geology
  • stariski creek
  • geology
  • soldotna
  • salamatof creek
  • dggs
  • kalifornsky
  • roque lake
  • tyonek creek
  • chuitbuna lake
  • coastal
  • beluga
  • subsidence
  • bunka lake
  • kenai river
  • kaldachabuna lake
  • cape starichkof
  • faulting
  • crooked creek
  • bishop creek
  • cook inlet
  • earthquake
  • ridgeway
  • tukallah lake
  • flood
  • chikdashla bena
  • fault displacement
  • nikiski bay
  • cape kasilof
  • geotechnical
  • cottonwood beach
  • kasilof
  • stormy lake
  • chuitna river
  • threemile creek
  • salamatof
  • neotectonics
  • beaver creek
  • spring water lakes
  • anchor river
  • clam creek
  • subduction
  • soldotna creek
  • geological process
  • active fault
  • suneva lake
  • landslide
  • geologic communications
  • hazards
  • emergency preparedness
  • foreland lake
  • shorty creek
  • johnson lake
  • kasilof river
  • chuit flats
  • cecille lake
  • surface
  • troublesome creek
  • travers creek
  • ninilchik river
  • ground motion
  • tsunami
  • geologic hazards
  • kenai
  • tyonek
  • ninilchik

Topics

  • Local Government

Categories