Two more jolts were felt later -- magnitude 4.9 in Kurung Kumey and 3.8 in East Kameng.
A 5.6-magnitude earthquake hit Arunachal Pradesh, Assam and other northeastern states in the afternoon today.
According to the India Meteorological Department's website, the earthquake's epicenter was located at a depth of 10 km at East Kameng district in Arunachal Pradesh.
Two more jolts were felt later -- magnitude 4.9 in Kurung Kumey at 3:21 pm and 3.8 magnitude at 3:04 pm in East Kameng.
According to reports, tremors were also felt in Guwahati, other parts of Assam and Dimapur in Nagaland around 2:52 pm, said news agency PTI.
No casualties have been reported so far, officials told PTI, adding that more details are awaited.