M4.4 Earthquake 57 km SE of Xunchang, China — August 31, 2021
2021-08-31 22:37:46 UTC (2021-08-31) · approx. 5:37 AM UTC+7 local
On August 31, 2021 at 22:37 UTC, a magnitude 4.4 shallow crustal earthquake struck 57 km SE of Xunchang, China, at a depth of 10.0 km and coordinates 28.1227°, 105.1700°.
Physical scale: An earthquake of magnitude 4.4 releases seismic energy equivalent to roughly 60 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 655 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
105.1700°E
Technical Information
Common Questions
How strong was the magnitude 4.4 earthquake near Xunchang, China?
The magnitude 4.4 earthquake that struck 57 km SE of Xunchang, China on August 31, 2021 at 22:37 UTC had a depth of 10.0 km. For context, this was a light earthquake commonly felt near the epicenter.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 4.4 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 4.4 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: us7000f9ec). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2021, August 31, 2021). M4.4 Earthquake 57 km SE of Xunchang, China — August 31, 2021. Retrieved November 6, 2021 from https://www.earthquaketracker.org/earthquakes/event/us7000f9ec/