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In particular, Love wave amplification measurements have the advantage of strong sensitivity to the crust. For the first time, we explore the potential of Love wave amplification measurements to image crustal velocity in the western U.S. The effects of overtone interference, radial anisotropy and Moho depth are all explored. Consequently, we present SWUS\u2010crust, a three\u2010dimensional shear\u2010wave velocity model of crustal structure in the western U.S. We use Rayleigh wave amplification measurements in the period range of 38\u2013114\u00a0s, along with Love wave amplification measurements in the period range of 38\u201362\u00a0s. We jointly invert over 6,400 multi\u2010frequency measurements using the Monte\u2010Carlo based Neighborhood Algorithm, which allows for uncertainty quantification. SWUS\u2010crust confirms several features observed in previous models, such as high\u2010velocity anomalies beneath the Columbia basin and low\u2010velocity anomalies beneath the Basin and Range province. Certain features are sharpened in our model, such as the northern border of the High\u2010Lava Plains in southern Oregon in the middle crust.<\/jats:p>","DOI":"10.1029\/2022jb026148","type":"journal-article","created":{"date-parts":[[2023,8,4]],"date-time":"2023-08-04T00:05:27Z","timestamp":1691107527000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":5,"title":["Crustal Structure of the Western U.S. From Rayleigh and Love Wave Amplification Data"],"prefix":"10.1029","volume":"128","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-1954-0889","authenticated-orcid":false,"given":"William","family":"Sturgeon","sequence":"first","affiliation":[{"name":"Department of Earth Sciences Faculty of Mathematical &amp; Physical Sciences University College London  London UK"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9492-6415","authenticated-orcid":false,"given":"Ana M. 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