Multiple earthquakes struck India’s Himalayan state of Sikkim late Wednesday night, with tremors also felt across northern Bangladesh. According to India’s National Center for Seismology (NCS) and the US Geological Survey (USGS), the epicenters were located in Sikkim’s Namchi and Mangan areas. The first major quake, measuring 4.6 on the Richter scale, occurred at 1:39 a.m. Bangladesh time, followed by two more of magnitudes 4.4 and 4.0 at 2:50 a.m. and 3:31 a.m. respectively. Several smaller aftershocks were recorded until around 6 a.m., totaling eight to ten tremors overall.

The quakes were shallow, with depths between 5 and 10 kilometers, which made the shaking more intense. Residents in Bangladesh’s Rangpur division reported strong vibrations and fear during the night. A resident of Nilphamari described the experience as terrifying, saying it felt as though the room might collapse.

Geological experts noted that Sikkim and the adjoining Himalayan region lie on an active fault line, making aftershocks common following a major tremor. Earlier in the week, a 5.9-magnitude quake in Myanmar and another in Satkhira’s Kalaroa area had also been felt across Bangladesh.