M4.9 Earthquake 103 km NNW of Aksu, China — February 26, 2023
2023-02-26 21:42:13 UTC (2023-02-26) · approx. 2:42 AM UTC+5 local
On February 26, 2023 at 21:42 UTC, a magnitude 4.9 shallow crustal earthquake struck 103 km NNW of Aksu, China, at a depth of 10.0 km and coordinates 42.0818°, 79.9463°. This earthquake was detected by 88 seismic stations with excellent location accuracy and was assigned a USGS significance rating of 369, placing it among routine seismic activity.
Physical scale: An earthquake of magnitude 4.9 releases seismic energy equivalent to roughly 338 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 1.4 km — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
79.9463°E
Technical Information
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Common Questions
How strong was the magnitude 4.9 earthquake near Aksu, China?
The magnitude 4.9 earthquake that struck 103 km NNW of Aksu, China on February 26, 2023 at 21:42 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 42.0818°, 79.9463°, which is 103 km NNW of Aksu, China.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 4.9 earthquakes can continue for several days and gradually diminish over time.
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Location
Authoritative source: USGS event page (event ID: us6000jrss). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2023, February 26, 2023). M4.9 Earthquake 103 km NNW of Aksu, China — February 26, 2023. Retrieved May 8, 2023 from https://www.earthquaketracker.org/earthquakes/event/us6000jrss/