Abstract：Taking the Ecuador subduction zone as an example, we establish a three-dimensional pure elastic and viscoelastic model of the area, and analyze the interseismic deformation based on the numerical simulation method. We estimate the optimal interseismic locking depth under different models using the interseismic GPS velocity field for more than 10 years as constraint. The results show that in the Ecuador subduction zone, the optimal interseismic locking depth based on the elastic model is about 30 to 35 km, while the optimal locking depth based on the viscoelastic model is 25 km. At the same time, compared with the elastic model, the viscoelastic model can better explain the interseismic surface deformation, indicating that in this area, the deep viscoelastic lithosphere will cause obvious upper crustal deformation under the pushing action of the subducting slabs.
YAN Fukang,TIAN Zhen,YANG Zhiqiang et al. Study on Interseismic Locking and Viscoelastic Deformation in the Ecuador Subduction Zone[J]. jgg, 2023, 43(10): 1080-1085.
