M4.7 Earthquake 14 km ESE of Xunchang, China — May 21, 2023
2023-05-21 19:56:44 UTC (2023-05-21) · approx. 2:56 AM UTC+7 local
On May 21, 2023 at 19:56 UTC, a magnitude 4.7 shallow crustal earthquake struck 14 km ESE of Xunchang, China, at a depth of 10.0 km and coordinates 28.4130°, 104.8535°. This earthquake was detected by 82 seismic stations with excellent location accuracy and was assigned a USGS significance rating of 340, placing it among routine seismic activity.
Physical scale: An earthquake of magnitude 4.7 releases seismic energy equivalent to roughly 169 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 1.1 km — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
104.8535°E
Technical Information
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Common Questions
How strong was the magnitude 4.7 earthquake near Xunchang, China?
The magnitude 4.7 earthquake that struck 14 km ESE of Xunchang, China on May 21, 2023 at 19:56 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 28.4130°, 104.8535°, which is 14 km ESE of Xunchang, China.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 4.7 earthquakes can continue for several days and gradually diminish over time.
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Location
Authoritative source: USGS event page (event ID: us6000kdqt). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2023, May 21, 2023). M4.7 Earthquake 14 km ESE of Xunchang, China — May 21, 2023. Retrieved July 29, 2023 from https://www.earthquaketracker.org/earthquakes/event/us6000kdqt/