Seismic response of unstable slopes using ambient noise analysis

The main purpose of the present work consists in the improvement of comprehension concerning directional amplification phenomena of slopes dynamic response by means of analysis of noise measurements. Ambient noise measurement tests, carried out using two kinds of portable sensors having different optimal response within different frequency ranges, have been aimed at formulating a possible generalization of the occurring conditions in prospect of using them as reliable indicators on the slopes behaviour in case of seismic event. A possible generalization should be based both on the comparison of instrumental data recorded during seismic events and on analysis of morphological and geological-technical characteristics of the test areas. In the context of this research project, the experimental tests have been mainly carried out within the municipality of Caramanico Terme, in Central Italy, since an ongoing accelerometer monitoring began in 2002 has provided data on slope dynamic behaviour by means of strong-motion recordings.