M4.7 Earthquake 198 km NW of Oula Xiuma, China — July 28, 2026
2026-07-28 09:52:01 UTC (2 hours ago) · approx. 4:52 PM UTC+7 local
Aftershock of the M5.1 mainshock.
On July 28, 2026 at 09:52 UTC, a magnitude 4.7 shallow crustal earthquake struck 198 km NW of Oula Xiuma, China, at a depth of 10.0 km and coordinates 35.3200°, 99.3836°. This earthquake was detected by 101 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.
This earthquake is part of an ongoing aftershock sequence following the magnitude 5.1 mainshock that occurred 3 hours ago 198 km NW of Oula Xiuma, China. Since the mainshock, the USGS has recorded 3 aftershocks in this area. Aftershock activity is expected to continue for days to weeks as stresses on surrounding faults redistribute.
Earthquake Details
99.3836°E
Technical Information
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Common Questions
How strong was the magnitude 4.7 earthquake near Oula Xiuma, China?
The magnitude 4.7 earthquake that struck 198 km NW of Oula Xiuma, China on July 28, 2026 at 09:52 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 35.3200°, 99.3836°, which is 198 km NW of Oula Xiuma, 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.
Is this the same earthquake as the M5.1 one earlier?
No. This magnitude 4.7 earthquake is an aftershock of the larger magnitude 5.1 mainshock that occurred earlier 198 km NW of Oula Xiuma, China. Aftershocks are smaller earthquakes triggered by stress changes from the mainshock.
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Location
Authoritative source: USGS event page (event ID: us6000tgc3). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2026, July 28, 2026). M4.7 Earthquake 198 km NW of Oula Xiuma, China — July 28, 2026. Retrieved July 28, 2026 from https://www.earthquaketracker.org/earthquakes/event/us6000tgc3/