Abstract:We analyze the displacement time series of the GEONET stations in Japan and the three-dimensional deformation characteristics in northeast China before and after the 3·11 Tohoku-Oki earthquake. Combined with seismic and magnetotelluric results, we discuss the present-day crustal movement and geodynamic environment of the Changbaishan volcano, northeast China. The results show that the Ou mountain is the crustal movement boundary in northeast Japan. After the 3·11 Tohoku-Oki earthquake, the stations located in the two sides of the boundary move to E direction. The effect of earthquake on the deformation in northeast China is not over yet. Affected by the plate subductions and crust-mantle magma movement, the present-day crustal deformation and earthquakes in Changbaishan volcano is related to the regional stress changes and magmatic activities.
HU Yaxuan,ZHAO Lingqiang,SONG Shangwu et al. Present-Day Crustal Deformation and Geodynamic Environment of the Changbaishan Volcano[J]. jgg, 2022, 42(4): 331-335.