The quake was epicentered near the boundary with Myanmar near Mizorm, as per data shared by the department.
It was recorded at 5.15 am, at a depth of 35 km, the data showed.
The tremors were felt in several places in Assam, Mizoram, Manipur and Tripura.
The northeastern region sits on a high seismic zone, making earthquakes frequent in the area. A 6.4 magnitude quake had shaken Assam and parts of the region on April 28.