Information for Strong-Motion Station
Anchorage - R B Atwood Bldg
NSMP Station 8040
Earthquakes recorded by this station
(Station Photograph - click to enlarge)(Sensor Layout - click to see PDF File)
Latitude 61.2150 N
Longitude 149.8930 W
Elevation (m) 34
Site Geology Deep alluvium
Vs30 (m/sec) 260 (measured)
Site Class D
No. of Stories above/below ground20 above + 1 below ground
Plan ShapeSquare: 39.6m x 39.6m
Base DimensionsSquare: 39.6m x 39.6m
Typical Floor DimensionsSquare: 39.6m x 39.6m
Design Date1979-1980
Instrumentation32 channels within building and associated surface and downhole array of 21 channels
Vertical Load Carrying SystemSteel Moment Resisting framed columns
Lateral Force Resisting SystemSteel Moment Resisting Frame with 14.6m x 14.6m center steel shear-walled core
Foundation TypeNo piles, 1.52m thick reinforced concrete perimeter mat interconnected with grade beams
RemarksInformation as published from the following reference: Çelebi, M. (2006). Recorded earthquake responses from the integrated seismic monitoring network of the Atwood Building, Anchorage, Alaska, Earthquake Spectra, 22(4), 847-864. Also see videos at: https://www.youtube.com/watch?v=Nt0m5JWa62w as visualization of shaking during 2016 Iniskin EQ and https://youtu.be/9MlvLdnwLY4 as visualization of shaking during 2018 Anchorage EQ.