GNGTS 2019 - Atti del 38° Convegno Nazionale

GNGTS 2019 S essione 2.1 285 3 shows the calculated mean value for the z component over all the studied frequency band. Preliminary analysis showed a good spatial correlation of noise level with some weather conditions and anthropogenic source. Some clustering techniques were applied to the data to identified group of stations with similar PSD level, attributable to the same noise source. References Arai H. and Tokimatsu K.; 2000: Effects of Rayleigh and love waves on microtremor H/V spectra. Proceedings of the 12th World Conference on Earthquake Engineering. Auckland, New Zealand. Arai H. and Tokimatsu K.; 1998: Evaluation of local site effects based on microtremor H/V spectra. Proceeding of the Second International Symposium on the Effects of Surface Geology on Seismic Motion. Yokohama, Japan, pp. 673–680. Asten M.W. and Henstridge J.D.; 1984: Array estimators and use of microseisms for reconnaissance of sedimentary basins. Geophysics , 49, pp. 1828-1837. Asten M.W.; 1978: Geological control of the three-component spectra of rayleigh-wave microseisms. Bull. Seism. Soc. Am., 68, pp. 1623-1636. Banerji S.K.; 1924: Microseisms associated with the incidence of the south-west monsoon. Nature, 114-2868, 576. Bonnefoy-Claudet S., Cotton F. and Bard P.-Y.; 2006: The nature of noise wavefield and its applications for site effects studies: A literature review. Earth-Science Reviews, 79(3-4), 205-227. Bonnefoy-Claudet S., Cornou C., Bard P.-Y. and Cotton F.; 2004: Nature of noise wavefield . SESAME report, D13.08 (http:// sesame-fp5.obs.ujf-grenoble.fr ). Bormann P. and Wielandt E.; 2002: Seismic signals and noise. New manual of seismological observatory practice, 2, 1-62. Groos J. C. and Ritter J. R. R.; 2009: Time domain classification and quantification of seismic noise in an urban environment. Geophysical Journal International, 179(2), 1213-1231. Fig. 3 - Spatial distribution of seismic noise power, referred to minimum value, for vertical component in the 0.025 - 30 Hz frequency band.