M5.1 Earthquake 166 km SSW of Merizo Village, Guam — March 31, 2021
2021-03-31 21:19:53 UTC (2021-03-31) · approx. 7:19 AM UTC+10 local
On March 31, 2021 at 21:19 UTC, a magnitude 5.1 shallow crustal earthquake struck 166 km SSW of Merizo Village, Guam, at a depth of 10.0 km and coordinates 11.9924°, 143.8474°.
Physical scale: An earthquake of magnitude 5.1 releases seismic energy equivalent to roughly 674 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 2.0 km — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
143.8474°E
Technical Information
Common Questions
How strong was the magnitude 5.1 earthquake near Merizo Village, Guam?
The magnitude 5.1 earthquake that struck 166 km SSW of Merizo Village, Guam on March 31, 2021 at 21:19 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 11.9924°, 143.8474°, which is 166 km SSW of Merizo Village, Guam.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 5.1 earthquakes can continue for days to weeks and gradually diminish over time.
Actions
Authoritative source: USGS event page (event ID: us6000dy24). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2021, March 31, 2021). M5.1 Earthquake 166 km SSW of Merizo Village, Guam — March 31, 2021. Retrieved December 22, 2025 from https://www.earthquaketracker.org/earthquakes/event/us6000dy24/