M4.6 Earthquake 57 km NE of Qujing, China — July 31, 2023
2023-07-31 17:56:44 UTC (2023-07-31) · approx. 12:56 AM UTC+7 local
On July 31, 2023 at 17:56 UTC, a magnitude 4.6 shallow crustal earthquake struck 57 km NE of Qujing, China, at a depth of 10.0 km and coordinates 25.8684°, 104.1677°. This earthquake was detected by 89 seismic stations with excellent location accuracy and was assigned a USGS significance rating of 326, placing it among routine seismic activity.
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
104.1677°E
Technical Information
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Common Questions
How strong was the magnitude 4.6 earthquake near Qujing, China?
The magnitude 4.6 earthquake that struck 57 km NE of Qujing, China on July 31, 2023 at 17:56 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 25.8684°, 104.1677°, which is 57 km NE of Qujing, 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.
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Location
Authoritative source: USGS event page (event ID: us6000kwwg). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2023, July 31, 2023). M4.6 Earthquake 57 km NE of Qujing, China — July 31, 2023. Retrieved October 7, 2023 from https://www.earthquaketracker.org/earthquakes/event/us6000kwwg/