HVSR – Nakamura’s Method

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

See AVS30 values from around the world, powered by SeisImager.com