M4.2 Earthquake 126 km WSW of Zhangye, China — January 22, 2023
2023-01-22 22:08:26 UTC (2023-01-22) · approx. 5:08 AM UTC+7 local
On January 22, 2023 at 22:08 UTC, a magnitude 4.2 shallow crustal earthquake struck 126 km WSW of Zhangye, China, at a depth of 11.3 km and coordinates 38.5293°, 99.0858°.
Physical scale: An earthquake of magnitude 4.2 releases seismic energy equivalent to roughly 30 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 476 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
99.0858°E
Technical Information
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Common Questions
How strong was the magnitude 4.2 earthquake near Zhangye, China?
The magnitude 4.2 earthquake that struck 126 km WSW of Zhangye, China on January 22, 2023 at 22:08 UTC had a depth of 11.3 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 4.2 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 4.2 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: us7000j6a5). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2023, January 22, 2023). M4.2 Earthquake 126 km WSW of Zhangye, China — January 22, 2023. Retrieved April 11, 2023 from https://www.earthquaketracker.org/earthquakes/event/us7000j6a5/