There are many geophysical and remote sensing methods to determine the crustal deformation and active tectonic movements. I need some research papers related to active tectonic movements in eastern part of India.
B. C. Das, S. Ghosh and A. Islam (Eds), 2019, Quaternary Geomorphology in India: Case Studies from the Lower Ganga Basin, Springer, 224p. https://doi.org/10.1007/978-3-319-90427-6