Seismic Wave Propagation and Basin Amplification in the Wasatch Front, Utah

Autor:	David Henry Churchwell, Oliver S. Boyd, Emily Wolin, Eric M. Thompson, John Rekoske, Morgan P. Moschetti
Rok vydání:	2021
Předmět:	Geophysics 010504 meteorology & atmospheric sciences Seismic wave propagation Structural basin 01 natural sciences Seismology Geology 0105 earth and related environmental sciences Front (military)
Zdroj:	Seismological Research Letters. 92:3626-3641
ISSN:	1938-2057 0895-0695
DOI:	10.1785/0220200449
Popis:	Ground-motion analysis of more than 3000 records from 59 earthquakes, including records from the March 2020 Mw 5.7 Magna earthquake sequence, was carried out to investigate site response and basin amplification in the Wasatch Front, Utah. We compare ground motions with the Bayless and Abrahamson (2019; hereafter, BA18) ground-motion model (GMM) for Fourier amplitude spectra, which was developed on crustal earthquake records from California and other tectonically active regions. The Wasatch Front records show a significantly different near-source rate of distance attenuation than the BA18 model, which we attribute to differences in (apparent) geometric attenuation. Near-source residuals show a period dependence of this effect, with greater attenuation at shorter periods (T
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::b6db39e5df5ea3fe93b21dd4543be051 https://doi.org/10.1785/0220200449 Zobrazit plný text záznamu