Implications on crustal structure from the South Finland Coastal (SOFIC) deep seismic sounding profile

We present results from a deep seismic sounding (DSS) experiment carried out along the southern coast of Finland in summer 2015. Data used survey derived industrial blasts recorded by temporary project stations and permanent network stations. The western 220 km part 450 long Southern Coastal (SOFIC) profile runs Uusimaa belt (UB) 1.7–1.9 Ga subprovince (SFS) Svecofennian domain, while 170 east crosses 1.62–1.65 Wiborg rapakivi batholith (WRB). farthest 60 cross geologically diverse area consisting supracrustal rocks granitoids Saimaa (SA), an eastern extension SFS. Our show that Moho boundary depth varies significantly, ca. 52–54 below UB to 40–45 WRB. All three crustal layers (upper, middle, lower) have their maximum contact zone between Below WRB, lower crust with Vp ~6.7–6.9 km/s is observed. High velocity was observed (Vp ~7.2 km/s) possibly SA ~7.35 km/s). modelling based on ray tracing, using extrapolation wave arrival times help travel predicted one-dimensional model. resulting two-dimensional model partly relies data intersecting DSS profiles supports previous observations lithospheric structure southeastern Fennoscandia.