M5.2 Earthquake 59 km NE of Simao, China — July 21, 2026
2026-07-21 11:43:07 UTC (2026-07-21) · approx. 6:43 PM UTC+7 local
On July 21, 2026 at 11:43 UTC, a magnitude 5.2 shallow crustal earthquake struck 59 km NE of Simao, China, at a depth of 10.0 km and coordinates 23.1288°, 101.4266°. This earthquake was detected by 117 seismic stations with excellent location accuracy and was assigned a USGS significance rating of 416, placing it among routine seismic activity.
Physical scale: An earthquake of magnitude 5.2 releases seismic energy equivalent to roughly 951 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 2.3 km — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
101.4266°E
Technical Information
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Common Questions
How strong was the magnitude 5.2 earthquake near Simao, China?
The magnitude 5.2 earthquake that struck 59 km NE of Simao, China on July 21, 2026 at 11:43 UTC had a depth of 10.0 km. For context, this was a moderate earthquake that could be widely felt.
Where did the earthquake occur?
The earthquake epicenter was located at 23.1288°, 101.4266°, which is 59 km NE of Simao, China.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 5.2 earthquakes can continue for days to weeks and gradually diminish over time.
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Location
Authoritative source: USGS event page (event ID: us7000t25s). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2026, July 21, 2026). M5.2 Earthquake 59 km NE of Simao, China — July 21, 2026. Retrieved August 28, 2026 from https://www.earthquaketracker.org/earthquakes/event/us7000t25s/