Fig. 9From: An experimental approach to unravel 2D ground resonances: application to an alluvial-sedimentary basinAnalysis of the L0 mode at all investigated sites within the Bolzano basin. a orientation of local longitudinal directions. b L0 frequencies, grouped into four intervals; c \({A}_{\mathrm{LONG}}/{A}_{\mathrm{VERT}}\) amplitudes, grouped into four intervals. d Bedrock model (modified from Sgattoni and Castellaro 2021) and location of measured 2D resonances (white dots). Digital Terrain Model from Geoportale Alto AdigeBack to article page