An earthquake of magnitude 3.6 occurred early morning on Tuesday, September 16th, 2025, at 2:22 am local time near Muswellbrook, New South Wales, Australia, as reported by Geoscience Australia (GeoAu).According to preliminary data, the quake was located at a very shallow depth of 1.9 miles. Shallow earthquakes are felt more strongly than deeper ones as they are closer to the surface. The exact magnitude, epicenter, and depth of the quake might be revised within the next few hours or minutes as seismologists review data and refine their calculations, or as other agencies issue their report.Our monitoring service identified a second report from the citizen-seismograph network of RaspberryShake which listed the quake at magnitude 3.7. A third agency, the European-Mediterranean Seismological Centre (EMSC), reported the same quake at magnitude 3.7.Based on the preliminary seismic data, the quake should not have caused any significant damage, but was probably felt by many people as light vibration in the area of the epicenter. Weak shaking might have been felt in Muswellbrook (pop. 12,100) located 5 miles from the epicenter, Denman (pop. 1,800) 11 miles away, and Aberdeen (pop. 2,000) 12 miles away.Other towns or cities near the epicenter where the quake might have been felt as very weak shaking include Scone (pop. 5,600) located 19 miles from the epicenter, Singleton Heights (pop. 4,600) 23 miles away, and Singleton (pop. 5,100) 24 miles away. In Cessnock (pop. 15,100, 45 miles away), and Maitland (pop. 67,100, 49 miles away), the quake was probably not felt.Earthquake data: Date & time: Sep 16, 2025 02:22 am (GMT +10) local time (15 Sep 2025 16:22 GMT)Magnitude: 3.6Depth: 2.98 kmEpicenter latitude / longitude: 32.33°S / 150.86°E (Muswellbrook, New South Wales, Australia)Primary data source: GeoAu