This paper describes results of our North-East Europe Earth crust study. Magnetization distribution modeling has been made along DSS profiles. Structural features of upper lithosphere were detected. The conclusion is made that the longwave magnetic anomalies can be produced by bottom crust layer which average depth is 20 km. Longwave magnetic anomalies has been selected and 3D-model for bottom magnetized Earth crust layer has been constructed. In the area of Timan-Pechora regional negative magnetic anomaly the magnetized layer boundary in lower crust goes down till 25-30 km, and in the North-East region of East European Craton it goes up to 14 km Maximum boundary rise of 12 km is located inside the Ilychevsk anomaly of Urals foredeep.