Plate motion along the Indo‐Burmese Arc (IBA), strain accommodation in the Indo‐Burmese wedge, status of active convergence and seismic vulnerability in the outer wedge, is a matter of concern due to the large population density in northeast India, Bangladesh, and Myanmar. In the present study, we have constrained the India‐Sunda plate motion by estimating the Euler pole using updated GPS observations from the region. Our estimated India‐Sunda relative plate motion at a point on the blind megathrust (24°N and 90°E) in Bangladesh constrains India‐Sunda relative motion at ~37 mm/year oriented along N11°E. This motion is partitioned among three major active units, namely, the Sagaing Fault (~18 mm/year), Churachandpur‐Mao Fault (~17 mm/year), and the blind megathrust (~7 mm/year), from west to east of the IBA, respectively. Our estimate of convergence across the blind megathrust is significantly lower than that estimated earlier. Due to large scatter in the data close to the updip edge of the blind megathrust, it is not certain whether it is accommodated through shallow creep or in stick‐slip manner, thus leading to uncertainty in the seismic hazard in this densely populated region.

中文翻译：

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印度缅甸弧中的印度桑达板块运动，地壳形变和地震危险

由于印度东北部，孟加拉国人口密度大，沿印度洋-缅弧（IBA）的板块运动，印度-缅甸楔形中的应变适应，外楔形中活跃的收敛状态和地震脆弱性等问题值得关注。和缅甸。在本研究中，我们通过使用来自该地区的最新GPS观测值来估算Euler极点，从而限制了印度-Sun他板块的运动。我们估计的孟加拉国盲大推力点（24°N和90°E）上的印度-India他相对板块运动将印度‐-da他沿N11°E定向的相对运动限制在每年约37毫米。从西到西，这一运动被划分为三个主要活动单元，即实皆断层（〜18 mm /年），丘拉克汉普布尔-毛断裂（〜17 mm /年）和盲大推力（〜7 mm /年）。分别位于IBA以东。我们对盲大推力的收敛估计远低于早先的估计。由于靠近巨型超推力上升缘边缘的数据散布很大，因此不确定是通过浅蠕变还是以粘滑方式容纳，从而导致该人口稠密地区地震危险性的不确定性。