GSI to commission seismic observatory in Tripura In order to facilitate the prediction of high intensity earthquakes in hilly parts of the Northeastern region, the Geological Survey of India (GSI) has asserted to commission a sophisticated seismic observatory at Agartala by the next three months. GSI Director General P M Tejale said here today the observatory lab would provide early detection of landslides as well as earthquakes, adding that the GSI had initiated a process to prepare a seismic micro-zonation map for hilly parts of the region including Tripura which falls under seismic Zone V and is vulnerable to earthquakes.