PATNA/KOLKATA: An earthquake measuring 5.5 on the Richter scale hits parts of Assam. Strong tremors were felt across the north-east belt including certain parts of Bihar, West Bengal and other Northeast states. The epicentre was in Kokrajhar, Assam, informed India Meteorological Department (IMD). The quake had a latitude of 26.4 N, 90.1 E longitude and a depth of 13 km. In Bihar, the earthquake tremors were felt in Patna, Kisanganj, Sahebjang, Khagaria and Hazaribag.