M4.5 Earthquake 224 km NNE of Colonia, Micronesia — March 27, 2026
2026-03-27 19:25:44 UTC (2026-03-27) · approx. 4:25 AM UTC+9 local
On March 27, 2026 at 19:25 UTC, a magnitude 4.5 shallow crustal earthquake struck 224 km NNE of Colonia, Micronesia, at a depth of 10.0 km and coordinates 11.3673°, 138.9675°. This earthquake was detected by 40 seismic stations with good location accuracy and was assigned a USGS significance rating of 312, placing it among routine seismic activity.
Physical scale: An earthquake of magnitude 4.5 releases seismic energy equivalent to roughly 85 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 767 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
138.9675°E
Technical Information
Common Questions
How strong was the magnitude 4.5 earthquake near Colonia, Micronesia?
The magnitude 4.5 earthquake that struck 224 km NNE of Colonia, Micronesia on March 27, 2026 at 19:25 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 11.3673°, 138.9675°, which is 224 km NNE of Colonia, Micronesia.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 4.5 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.
Authoritative source: USGS event page (event ID: us6000sn9b). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2026, March 27, 2026). M4.5 Earthquake 224 km NNE of Colonia, Micronesia — March 27, 2026. Retrieved May 20, 2026 from https://www.earthquaketracker.org/earthquakes/event/us6000sn9b/