An earthquake measuring 4.0 on the Richter scale hit Bihar's Siwan on Monday morning at a depth of 10 km, according to the National Center for Seismology (NCS). The tremors were felt at 8:02 am. "EQ of M: 4.0, On: 17/02/2025 08:02:08 IST, Lat: 25.93 N, Long: 84.42 E, Depth: 10 Km, Location: Siwan, Bihar," NCS posted on X.