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State of Alaska Alaska / Natural Resources DNR / Geological & Geophysical Surveys DGGS / Geologic HazardsHazards / Barry Arm LandslideBarry Arm

Barry Arm Previous Updates

March 26, 2021

  • The Alaska Volcano Observatory (AVO) infrasound array in Whittier is operational and returning real-time data. No signals from the Barry Arm area were detected by the automated alarm or in manual reviews of the data. The array does continue to pick up anthropogenic noise from the Whittier tunnel and town.
  • The Alaska Earthquake Center (AEC) seismic station on the landslide continues to send real-time data. No significant changes in seismicity have been observed.
  • The AEC seismic station and camera across the fjord remain out of communication, likely a result of snow blocking the radio link.
  • Planning is underway for multi-agency fieldwork this summer to address the Barry Arm landslide and tsunami hazard.

March 12, 2021

  • On March 6th, The Alaska Volcano Observatory (AVO) field crews shored-up power to the Whittier infrasound array, improving signal characteristics. The data quality is currently good.
  • The City of Whittier performed maintenance on and tested their existing tsunami siren this week and is investigating adding a second alert siren.
  • The Alaska Department of Homeland Security & Emergency Management (DHS&EM) provided the City of Whittier with new tsunami evacuation signage.

February 26, 2021

February 12, 2021

  • On February 9, The Alaska Volcano Observatory (AVO) installed an infrasound (microphone) array in Whittier to assist with monitoring the landslide. After a calibration period, this array could aid in a future real-time warning system.
  • The Alaska Division of Geological & Geophysical Surveys (DGGS) published high-resolution elevation data of the Barry Arm landslide collected on June 26, 2020.
  • The U.S. Geological Survey (USGS) published a structure map of landslides at Barry Arm, identifying various slope and geologic features. The mapping utilized elevation data recently published by DGGS. The landslide structures and movements shown on this map will be used to monitor landslide evolution and help estimate landslide volumes for tsunami modeling.

Contact Information

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Alaska Department of Natural Resources
Division of Geological & Geophysical Surveys
3354 College Road
Fairbanks, AK 99709
907-451-5000
barryarm@alaska.gov

U.S. Department of the Interior
U.S. Geological Survey
Landslide Hazards Program
12201 Sunrise Valley Drive
Reston, VA 20192
703-648-5953
https://www.usgs.gov/natural-hazards/landslide-hazards

U.S. Department of Commerce
National Oceanic and Atmospheric Administration
National Weather Service
National Tsunami Warning Center
910 S. Felton Street
Palmer, AK 99645
907-861-4202
https://www.tsunami.gov/
Twitter: @NWS_NTWC
Facebook: facebook.com/nwsntwc

U.S. Department of Agriculture
Forest Service
Chugach National Forest
161 East 1st Ave., Door 8
Anchorage, Alaska 99501
907-743-9500
https://www.fs.usda.gov/chugach/

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