M4.6 Earthquake 57 km SSE of Xunchang, China — September 23, 2021
2021-09-23 20:08:34 UTC (2021-09-23) · approx. 3:08 AM UTC+7 local
On September 23, 2021 at 20:08 UTC, a magnitude 4.6 shallow crustal earthquake struck 57 km SSE of Xunchang, China, at a depth of 10.0 km and coordinates 28.0090°, 105.0229°.
Physical scale: An earthquake of magnitude 4.6 releases seismic energy equivalent to roughly 120 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 899 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
105.0229°E
Technical Information
Common Questions
How strong was the magnitude 4.6 earthquake near Xunchang, China?
The magnitude 4.6 earthquake that struck 57 km SSE of Xunchang, China on September 23, 2021 at 20:08 UTC had a depth of 10.0 km. For context, this was a light earthquake commonly felt near the epicenter.
Where did the earthquake occur?
The earthquake epicenter was located at 28.0090°, 105.0229°, which is 57 km SSE of Xunchang, China.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 4.6 earthquakes can continue for several days and gradually diminish over time.
Actions
Location
Authoritative source: USGS event page (event ID: us7000fdvz). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2021, September 23, 2021). M4.6 Earthquake 57 km SSE of Xunchang, China — September 23, 2021. Retrieved December 3, 2021 from https://www.earthquaketracker.org/earthquakes/event/us7000fdvz/