The Horizontal-to-Vertical Spectral Ratio (HVSR) technique is a passive-seismic method used to determine the resonance characteristics of a site. Using environmental microtremors recorded using a 3-component geophone, the fundamental resonance frequency of the ground is able to be obtained.
In earthquake engineering, HVSR data is important for understanding site effects. It was developed in the 1980’s by Yutaka Nakamura, and is also known as Nakamura’s Method.
N-Survey H/V Gallery
HVSR – Geophysics Explained
SeisImager HVSR Database
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