M4.4 Earthquake 33 km SE of Sơn La, Vietnam — October 18, 2026
2026-10-18 23:59:22 UTC (2 hours ago) · approx. 6:59 AM UTC+7 local
On October 18, 2026 at 23:59 UTC, a magnitude 4.4 shallow crustal earthquake struck 33 km SE of Sơn La, Vietnam, at a depth of 10.0 km and coordinates 21.1202°, 104.1567°.
Physical scale: An earthquake of magnitude 4.4 releases seismic energy equivalent to roughly 60 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 655 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
104.1567°E
Technical Information
Common Questions
How strong was the magnitude 4.4 earthquake near Sơn La, Vietnam?
The magnitude 4.4 earthquake that struck 33 km SE of Sơn La, Vietnam on October 18, 2026 at 23:59 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 4.4 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 4.4 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: us6000u38y). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2026, October 18, 2026). M4.4 Earthquake 33 km SE of Sơn La, Vietnam — October 18, 2026. Retrieved October 19, 2026 from https://www.earthquaketracker.org/earthquakes/event/us6000u38y/