M4.1 Earthquake 150 km N of Saipan, Northern Mariana Islands — April 2, 2025
2025-04-02 18:20:09 UTC (2025-04-02) · approx. 4:20 AM UTC+10 local
On April 2, 2025 at 18:20 UTC, a magnitude 4.1 intermediate depth earthquake struck 150 km N of Saipan, Northern Mariana Islands, at a depth of 144.4 km and coordinates 16.5470°, 146.0182°.
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.
Earthquake Details
146.0182°E
Technical Information
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Common Questions
How strong was the magnitude 4.1 earthquake near Saipan, Northern Mariana Islands?
The magnitude 4.1 earthquake that struck 150 km N of Saipan, Northern Mariana Islands on April 2, 2025 at 18:20 UTC had a depth of 144.4 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.
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Understanding This Data
Magnitude 4.1 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: us6000q5ft). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2025, April 2, 2025). M4.1 Earthquake 150 km N of Saipan, Northern Mariana Islands — April 2, 2025. Retrieved June 9, 2025 from https://www.earthquaketracker.org/earthquakes/event/us6000q5ft/