M3.9 Earthquake 29 km NNW of Dededo Village, Guam — February 12, 2025
2025-02-12 23:25:34 UTC (2025-02-12) · approx. 9:25 AM UTC+10 local
On February 12, 2025 at 23:25 UTC, a magnitude 3.9 intermediate depth earthquake struck 29 km NNW of Dededo Village, Guam, at a depth of 123.5 km and coordinates 13.7488°, 144.7046°.
Physical scale: An earthquake of magnitude 3.9 releases seismic energy equivalent to roughly 11 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 296 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 5.3 mainshock that occurred 26 days ago 40 km NE of Yigo Village, Guam. Since the mainshock, the USGS has recorded 3 aftershocks in this area. Aftershock activity is expected to continue for days to weeks as stresses on surrounding faults redistribute.
Earthquake Details
144.7046°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 3.9 earthquake near Dededo Village, Guam?
The magnitude 3.9 earthquake that struck 29 km NNW of Dededo Village, Guam on February 12, 2025 at 23:25 UTC had a depth of 123.5 km. For context, this was a minor earthquake typically detected only by instruments.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 3.9 earthquakes can continue for several days and gradually diminish over time.
Is this the same earthquake as the M5.3 one earlier?
No. This magnitude 3.9 earthquake is an aftershock of the larger magnitude 5.3 mainshock that occurred earlier 40 km NE of Yigo Village, Guam. Aftershocks are smaller earthquakes triggered by stress changes from the mainshock.
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Understanding This Data
Magnitude 3.9 earthquakes are typically only recorded by instruments.
Authoritative source: USGS event page (event ID: us7000pf0w). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2025, February 12, 2025). M3.9 Earthquake 29 km NNW of Dededo Village, Guam — February 12, 2025. Retrieved May 2, 2025 from https://www.earthquaketracker.org/earthquakes/event/us7000pf0w/