Electronic Supplement to
Development of VS Profile Database and Proxy-Based Models for VS30 Prediction in the Pacific Northwest Region of North America

by Sean K. Ahdi, Jonathan P. Stewart, Timothy D. Ancheta, Dong Youp Kwak, and Devjyoti Mitra

This electronic supplement includes a spreadsheet file containing the VS profiles in the profile database (PDB) that is described in the main article (Table S1), a spreadsheet file containing metadata for all PDB locations used in this study (Table S2), a spreadsheet file containing metadata for all Next Generation Attenuation (NGA)-Subduction site database (SDB) sites for which VS30 was estimated using the models developed in this and previous studies (Table S3), and tables with descriptions of individual columns found in each of Tables S1, S2, and S3 (Tables S4–S6).


Tables

Table S1 [Plain text comma-separated values; ~637 KB]. VS profiles for Pacific Northwest (PNW) sites having geophysical site characterization. The site ID field is a unique site identifier which can be correlated to sites in the PDB (Table S2).

Table S2 [Plain text comma-separated values; ~419 KB]. PDB for PNW sites. The database includes time-averaged shear-wave velocities at various intervals over the profile depth (VSZ), including to 30 m (VS30), as well as metadata used for proxy development and analysis.

Table S3 [Plain text comma-separated values; ~359 KB]. SDB of NGA-Subduction strong-motion accelerometer (SMA) sites. The database includes measurement- and proxy-based VS30 values, as well as metadata required for implementation of proxies as described in the main article.

Table S4. VS PDB for the PNW region of North America—VS profiles (refer to Table S1). Further explanations can be found in the main article.

Table S5. VS PDB for the PNW region of North America—VS profile metadata (refer to Table S2). Further explanations can be found in the main article.

Table S6. NGA subduction SDB for Cascadia subduction zone events (refer to Table S3). Further explanations can be found in the main article.


References

Bilderback, E. L., S. P. Palmer, D. S. Folger, J. L. Poelstra, S. L. Magsino, and R. A. Niggemann (2008). Shear-wave database for quaternary and bedrock geologic units, Washington State, Open-File Rept. 2008-2 (WA-DNR_08-2), Washington State Department of Natural Resources, Division of Geology and Earth Resources, Olympia, Washington.

Cakir, R., and T. J. Walsh (2009). Shallow-seismic site characterizations of near-surface geology at 20 strongmotion stations in Washington State, Final Technical Report Submitted to the USGS, USGS/NEHRP Award Number G09AP00021, Washington State Department of Natural Resources, Olympia, Washington.

Cakir, R., and T. J. Walsh (2010). Shallow seismic site characterizations at 23 strong-motion stations sites in and near Washington State, Final Technical Report submitted to the USGS, USGS/NEHRP Award Number G10AP00027, Washington State Department of Natural Resources, Olympia, Washington.

Cakir, R., and T. J. Walsh (2011). Shallow seismic site characterizations at 25 ANSS/PNSN stations and compilation of site-specific data for the entire strongmotion network in Washington and Oregon, Final Technical Report, USGS/NEHRP Award Number G11AP20045, Washington State Department of Natural Resources, Olympia, Washington.

Dai, Z., X. Li, and C. Hou (2013). A shear-wave velocity model for VS30 estimation based on a conditional independence property, Bull. Seismol. Soc. Am. 103, no. 6, 3354–3361.

Dobry, R., R. D. Borcherdt, C. B. Crouse, I. M. Idriss, W. B. Joyner, G. R. Martin, M. S. Power, E. E. Rinne, and R. B. Seed (2000). New site coefficients and site classification system used in recent building seismic code provisions, Earthq. Spectra 16, 41–67.

Dunn, D., and B. Ricketts (1994). Surficial geology of Fraser Lowlands digitized from GSC Maps 1484A, 1485A, 1486A, and 1487A (92G/1, 2, 3, 6, 7; 92H/4), Geol. Surv. Canada, Open-File Rept. 2894, 4 maps at 1:50,000 scale.

Hunter, J. A., R. A. Burns, R. L. Good, and C. F. Pelletier (1998). A compilation of shear wave velocities and borehole geophysics logs in unconsolidated sediments of the Fraser River Delta, British Columbia, Geol. Surv. Canada, Open-File Rept. 3622, Ottawa, Canada.

Iwahashi, J., and R. J. Pike (2007). Automated classifications of topography from DEMs by an unsupervised nested-means algorithm and a three part geometric signature, Geomorphology 86, nos. 3/4, 409–440.

Madin, I., and W. J. Burns (2013). Ground motion, ground deformation, tsunami inundation, coseismic subsidence, and damage potential maps for the 2012 Oregon Resilience Plan for Cascadia subduction zone earthquakes, Oregon Department of Geology and Mineral Industries (DOGAMI), Open-File Rept. O-13-06, 41 pp.

Odum, J. K., W. J. Stephenson, K. Goetz-Troost, D. M. Worley, A. D. Frankel, R. A. Williams, and J. Fryer (2004). Shear- and compressional-wave velocity measurements from two 150-m-deep boreholes in Seattle, Washington, USA, U.S. Geol. Surv. Open-File Rept. 2004-1419, 36 pp.

Parker, G. A., J. A. Harmon, J. P. Stewart, Y. M. A. Hashash, A. R. Kottke, E. M. Rathje, W. J. Silva, and K. W. Campbell (2017). Proxy-based VS30 estimation in central and eastern North America, Bull. Seismol. Soc. Am. 107, no. 1, 117–131.

Pierce, K. L. (2003). Pleistocene glaciations of the Rocky Mountains, Dev. Quaternary Sci. 1, 63–76.

Shannon & Wilson, Inc., and Agbabian Associates (1980). Geotechnical and strong motion earthquake data from U.S. accelerograph stations, U.S. Nuclear Regulatory Commission (NUREG) Rept. CR-0985, Vol. 4.

Smith, R. L., and W. P. Roe (2015). Oregon Geologic Data Compilation (OGDC)—Release 6, Oregon Department of Geology and Mineral Industries (DOGAMI), Open-File Rept. O-13-12, electronic dataset.

Washington State Department of Natural Resources, Division of Geology and Earth Resources (WA-DNR-GER) (2010). Digital Geology of Washington State at 1:100,000 Scale, June 2010: Washington State Department of Natural Resources, Division of Geology and Earth Resources, Version 3.0.

Washington State Department of Natural Resources, Division of Geology and Earth Resources (WA-DNR-GER) (2014). Surface Geology, 1:24,000—GIS Data, June 2014: Washington Division of Geology and Earth Resources Digital Data Series DS-10, Version 1.0.

Wills, C. J., C. I. Gutierrez, F. G. Perez, and D. M. Branum (2015). A next generation VS30 map for California based on geology and topography, Bull. Seismol. Soc. Am. 105, no. 6, 3083–3091.

Wong, I. G., K. H. Stokoe II, B. R. Cox, Y.-C. Lin, and F.-Y. Menq (2011). Shear-wave velocity profiling of strong motion sites that recorded the 2001 Nisqually, Washington, earthquake, Earthq. Spectra 27, no. 1, 183–212.

Yong, A. (2016). Comparison of measured and proxy-based VS30 values in California, Earthq. Spectra 32, no. 1, 171–192.

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