M4.2 Earthquake 152 km W of Umatac Village, Guam — May 10, 2026
2026-05-10 21:20:19 UTC (2026-05-10) · approx. 7:20 AM UTC+10 local
On May 10, 2026 at 21:20 UTC, a magnitude 4.2 intermediate depth earthquake struck 152 km W of Umatac Village, Guam, at a depth of 186.8 km and coordinates 13.1888°, 143.2628°.
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
143.2628°E
Technical Information
Common Questions
How strong was the magnitude 4.2 earthquake near Umatac Village, Guam?
The magnitude 4.2 earthquake that struck 152 km W of Umatac Village, Guam on May 10, 2026 at 21:20 UTC had a depth of 186.8 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.
What should I do after an earthquake?
If you were in the affected area: check yourself and others for injuries, inspect your home for damage, and be prepared for aftershocks. For detailed guidance, see our earthquake safety guide and emergency planning resources.
Actions
Understanding This Data
Magnitude 4.2 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: us6000sysd). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2026, May 10, 2026). M4.2 Earthquake 152 km W of Umatac Village, Guam — May 10, 2026. Retrieved May 21, 2026 from https://www.earthquaketracker.org/earthquakes/event/us6000sysd/