Shimla: India Meteorological Department today said that slight intensity earthquake hit parts of Himachal Pradesh last night. According to Director of Meteorological Department, Manmohan Singh, a slight intensity tremor hit Mandi district at 2147hrs(IST) as it was measured as 3.5 on Richter scale. He said that epicenter of earthquake was at Latitude of 31.5 degree North and Longitude of 76.8 degree East.