Currently, Rayleigh and Love waves extracted from ambient noise are widely used to constrain isotropic shear‐wave velocities and radial anisotropy of the lithosphere in ambient noise tomography. However, retrieving Love‐wave signals with periods longer than 40 or 50 s from ambient noise data remains a challenge. In this study, we report that reliable Love waves with periods of 40–80 s can be successfully retrieved from ambient noise using a root mean square ratio selection stacking (RMSR_SS) method. We further demonstrate that these broadband Love‐wave signals, retrieved from approximately two years of ambient noise data, can be used to constrain phase velocity maps. The extraction of long‐period Love waves from ambient noise provides supplementary data for the study of radial anisotropy in the lithosphere or asthenosphere.

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