Average shear wave velocity of the plain of the province of Treviso (Northern Italy)

The accompanying map is the result of a regional survey to present average shear wave velocity in the uppermost layers (20–40 m in depth) of a large area situated in the province of Treviso, northeastern Italy. The research was conducted using the Refraction Microtremors (ReMi) seismic technique. Data from a total of 250 recording stations, scattered over an area of 2000 km2, was collected during a two months in early 2006. The final Vs map shows the tight correlation between the seismic response of the area and the structure of alluvial deposits formed during late Pleistocene and Holocene. The ReMi technique, as well as the other techniques based on the survey of the surface wave, can be valuable tools for regional mapping average values of the shear wave in near surface deposits. These data, from a seismological perspective, along with measurements of the fundamental period, represent an excellent alternative for the site modeling.