Abstract We present three case studies from recent site investigations that have utilised geophysical data to supplement traditional geotechnical investigations. The refraction microtremor (ReMi) method, which measures the shear-wave velocity of subsurface soil profile, is used enhance our overall understanding conditions. Interpolation closely spaced one-dimensional velocity-depth profiles alo...

Abstract The study used data acquired by the ESG6 Blind Prediction Step BP1 Working Group for purposes of facilitating a comparison interpretation methods obtaining shear-wave velocity profiles (V s ) from array observations microtremor (passive seismic) noise. This work uses direct-fitting MMSPAC method and krSPAC on passive seismic supplied four seven-station nested triangular arrays with ape...

Ocular microtremor (OMT) is a fine high frequency tremor of the eyes caused by extra-ocular muscle activity stimulated by impulses emanating in the brain stem. Several studies have shown that the frequency of this tremor is reduced in patients whose consciousness is reduced by anaesthesia or head injury. Therefore, OMT may possibly be used to determine depth of anaesthesia. Twenty-two unpre-med...

To examine the upper limit of analyzable wavelength ranges (upper wavelength, ULW) spatial autocorrelation (SPAC) method in microtremor surveys, we have derived a formula evaluating stochastic errors phase velocity estimate obtained by SPAC method. We then followed our previous paper to evaluate biases generated that come from presence incoherent noise so could discuss which is crucial factor d...

Abstract In 2008, the Wenchuan earthquake triggered many large landslides with rapid movement and long runouts, resulting in a great number of casualties. Although there have been studies geographical features initiation mechanisms some catastrophic landslides, for remain unclear. this paper, we present case study landslide (debris avalanche) by 2008 Donghekou area, Sichuan Province, China. We ...

The parameters of the bridge's resistance to dynamic loads, such as natural frequency and damping ratio, were determined by theoretical experimental modal analysis. Microtremor measurements performed on two types bridges: steel truss bridges reinforced concrete bridges. goal is establish value characteristics well feasibility based SNI 2833-2008's vibration period limit. test used compare frequ...

Abstract 1D velocity profiles at a strong motion station in the northern part of Kumamoto plain, Japan, were submitted Step-1 blind prediction exercise ground motions sixth international symposium on effects surface geology seismic (ESG6). Individual participants requested to estimate S-wave profile sedimentary layers from given data obtained by microtremor array explorations and surface-wave s...

Abnormalities in the oculomotor control mechanism of patients with idiopathic Parkinson's disease are well recognised. In this study the effect of Parkinson's disease on tonic output from oculomotor nuclei was studied by using oculomicrotremor as an index of such output. Oculomicrotremor readings were taken from 22 parkinsonian patients and 22 normal healthy volunteers using the piezoelectric s...