The understanding of the lateral variations in the lithospheric strength can help in identifying the distribution pattern of surface deformation and its response to long-term forces that are related to deep Earth processes. Former studies suggest that Afar and the Ethiopian Plateaus are not in isostatic equilibrium indicating the presence of deep compensation processes. We estimated the effective elastic thickness of the lithosphere (Te) over Ethiopia and its surrounding region using a method that combines the Vening Meinesz-Mortiz and flexural theory of isostasy in a spherical harmonics domain. Our effective elastic thickness model is different from those presented in the previous similar studies, because of considering the effects of mantle dynamics. We incorporated the uplift forces due to mantle plume in additions to surface and sub-surfaces loads, like topographic/bathymetric masses, crustal crystalline and sediments in our method so that it becomes more appropriate for the regions. In addition, laterally-variable models of upper mantle density, Young's modulus and Poisson's ratio have been considered from the CRUST1.0 model. We found a significant improvement of the solution in the Te estimate with consideration of the dynamic effects when we compared it with other studies especially in Afar, the Ethiopian plateaus, and the Main Ethiopian Rift valley. Our results are also consistent with significant lithospheric strength present in cratonic formations, with maximum of Te in Sudan and Tanzanian Cratons. Low Te was found over different tectonically active places such as, Afar and the Main Ethiopian Rift valley.

了解岩石圈强度的横向变化有助于确定地表变形的分布模式及其对与地球深部过程相关的长期作用力的响应。以前的研究表明，阿法尔和埃塞俄比亚高原并不处于均衡平衡，表明存在深度补偿过程。我们使用将 Vening Meinesz-Mortiz 和球谐函数域中的均衡弯曲理论相结合的方法估计了埃塞俄比亚及其周边地区岩石圈 (Te) 的有效弹性厚度。由于考虑了地幔动力学的影响，我们的有效弹性厚度模型与之前类似研究中提出的模型不同。我们在我们的方法中加入了地幔柱引起的抬升力以及地表和次地表载荷，如地形/测深质量、地壳结晶和沉积物，使其更适合该地区。此外，CRUST1.0 模型还考虑了上地幔密度、杨氏模量和泊松比的横向变化模型。当我们将 Te 估计中的解与其他研究进行比较时，特别是在阿法尔、埃塞俄比亚高原和埃塞俄比亚主裂谷中，考虑到动态效应，我们发现了该解的显着改进。我们的结果也与克拉通地层中存在的显着岩石圈强度一致，在苏丹和坦桑尼亚克拉通中 Te 含量最高。在不同的构造活动地点发现了低 Te，例如，