M3.9 Earthquake 91 km N of Saipan, Northern Mariana Islands — January 25, 2025
2025-01-25 17:32:42 UTC (2025-01-25) · approx. 3:32 AM UTC+10 local
On January 25, 2025 at 17:32 UTC, a magnitude 3.9 intermediate depth earthquake struck 91 km N of Saipan, Northern Mariana Islands, at a depth of 123.3 km and coordinates 16.0353°, 145.7179°.
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.
Earthquake Details
145.7179°E
Technical Information
Common Questions
How strong was the magnitude 3.9 earthquake near Saipan, Northern Mariana Islands?
The magnitude 3.9 earthquake that struck 91 km N of Saipan, Northern Mariana Islands on January 25, 2025 at 17:32 UTC had a depth of 123.3 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.
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Understanding This Data
Magnitude 3.9 earthquakes are typically only recorded by instruments.
Authoritative source: USGS event page (event ID: us7000pb1w). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2025, January 25, 2025). M3.9 Earthquake 91 km N of Saipan, Northern Mariana Islands — January 25, 2025. Retrieved April 8, 2025 from https://www.earthquaketracker.org/earthquakes/event/us7000pb1w/