Variability of surface deposits and their impact on ground motion: An analysis in northeast Buenos Aires, Argentina

Abstract

In this study, we present the preliminary results of an ambient seismic noise investigation conducted in the northeast of Buenos Aires province, Argentina. The local geology features a metamorphic rock basement located approximately 450 meters deep, followed by a multilayer sequence of siliciclastic sediments. The surface deposits in the study area vary between the Continental Plain and the Coastal Plain. In the Continental Plain, they consist of loessic clayey deposits that shape undulating terrain. As for the Coastal Plain, bordering the estuary of the Rio de la Plata, the clayey loessic depositsare covered by a thin layer, typically thinner than 5 - 10 meters in thickness, of muddy clayey deposits.