General Information
Abstract: Regional mapping of soil stiffness improves understanding of seismic hazard in northern Canada, specifically southwestern Yukon, where local amplification hazards are largely unknown. Ambient vibration (AV) measurements record microtremor seismic noise used to calculate the horizontalto-vertical spectral ratio (HVSR) and identify resonant frequencies at sites. In-situ estimation of fundamental frequency (f0) is used to characterize sites and map local site amplification hazards. Furthermore, AV measurements permit the estimation of surface-wave propagation speeds at different frequencies (i.e., dispersion). Dispersion measurements are used to infer profiles of shear-wave velocity as a function of depth. We present preliminary site characterization using AV measurements from 23 measured sites in Haines Junction, Yukon. The preliminary results suggest a spatial trend of fundamental frequency laterally, where higher frequencies are identified north of Haines Junction and lower f0 values are identified in south-central Haines Junction. We attribute these observations to the proximity to the Dezadeash River basin.
Authors: Leishman, T., Gosselin, J.M., Dettmer, J., Cassidy, J.F. and Kang, T.-S.
NTS Mapsheet(s): 115A11, 115A12, 115A13, 115A14
Citation: Leishman, T., Gosselin, J.M., Dettmer, J., Cassidy, J.F. and Kang, T.-S., 2024. Preliminary site characterization for earthquake hazard assessment using ambient vibration techniques in Haines Junction, Yukon (parts of NTS 115A/11, 12, 13, 14). In: Yukon Exploration and Geology Technical Papers 2023, L.H. Weston and Purple Rock Inc. (eds.), Yukon Geological Survey, p. 57–76.
Downloads
Name | Comment | |
---|---|---|
Paper | This PDF is 12 MB. | Download PDF |
Location Map
NTS Mapsheet(s): 115A11, 115A12, 115A13, 115A14
Related Occurrences
Name | Number | Type | Status |
---|
Related Compilations
Compilation Name | Feature Type | Update Frequency |
---|
Related Publications
Number | Relationship | Authors | Title |
---|---|---|---|
YEG2023 | Contained By | L.H. Weston and Purple Rock Inc. (eds.) | Yukon Exploration and Geology 2023 |