M4.1 Earthquake 24 km S of Merizo Village, Guam — January 16, 2025
2025-01-16 19:37:01 UTC (2025-01-16) · approx. 5:37 AM UTC+10 local
On January 16, 2025 at 19:37 UTC, a magnitude 4.1 shallow crustal earthquake struck 24 km S of Merizo Village, Guam, at a depth of 51.9 km and coordinates 13.0477°, 144.6729°.
Physical scale: An earthquake of magnitude 4.1 releases seismic energy equivalent to roughly 21 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 406 m — a useful intuition for the size of the slip patch on the fault.
This earthquake is part of an ongoing aftershock sequence following the magnitude 5.0 mainshock that occurred 11 days ago 58 km SSW of Merizo Village, Guam. Since the mainshock, the USGS has recorded 0 aftershocks in this area. Aftershock activity is expected to continue for days to weeks as stresses on surrounding faults redistribute.
Earthquake Details
144.6729°E
Technical Information
Common Questions
How strong was the magnitude 4.1 earthquake near Merizo Village, Guam?
The magnitude 4.1 earthquake that struck 24 km S of Merizo Village, Guam on January 16, 2025 at 19:37 UTC had a depth of 51.9 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 4.1 earthquakes can continue for several days and gradually diminish over time.
Is this the same earthquake as the M5.0 one earlier?
No. This magnitude 4.1 earthquake is an aftershock of the larger magnitude 5.0 mainshock that occurred earlier 58 km SSW of Merizo Village, Guam. Aftershocks are smaller earthquakes triggered by stress changes from the mainshock.
Actions
Understanding This Data
Magnitude 4.1 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: us6000pm55). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2025, January 16, 2025). M4.1 Earthquake 24 km S of Merizo Village, Guam — January 16, 2025. Retrieved March 29, 2025 from https://www.earthquaketracker.org/earthquakes/event/us6000pm55/