M4.0 Earthquake 244 km W of Qamdo, China — July 29, 2023
2023-07-29 20:44:18 UTC (2023-07-29) · approx. 2:44 AM UTC+6 local
On July 29, 2023 at 20:44 UTC, a magnitude 4.0 shallow crustal earthquake struck 244 km W of Qamdo, China, at a depth of 10.0 km and coordinates 30.7849°, 94.6516°.
Physical scale: An earthquake of magnitude 4.0 releases seismic energy equivalent to roughly 15 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 347 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
94.6516°E
Technical Information
Common Questions
How strong was the magnitude 4.0 earthquake near Qamdo, China?
The magnitude 4.0 earthquake that struck 244 km W of Qamdo, China on July 29, 2023 at 20:44 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 4.0 earthquakes can continue for several days and gradually diminish over time.
Actions
Location
Understanding This Data
Magnitude 4.0 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: us6000kwk9). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2023, July 29, 2023). M4.0 Earthquake 244 km W of Qamdo, China — July 29, 2023. Retrieved September 30, 2023 from https://www.earthquaketracker.org/earthquakes/event/us6000kwk9/