M4.0 Earthquake 72 km NW of Saipan, Northern Mariana Islands — April 15, 2025
2025-04-15 19:20:56 UTC (2025-04-15) · approx. 5:20 AM UTC+10 local
On April 15, 2025 at 19:20 UTC, a magnitude 4.0 intermediate depth earthquake struck 72 km NW of Saipan, Northern Mariana Islands, at a depth of 291.2 km and coordinates 15.7443°, 145.3611°.
Physical scale: An earthquake of magnitude 4.0 releases seismic energy equivalent to roughly 15 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 347 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
145.3611°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 4.0 earthquake near Saipan, Northern Mariana Islands?
The magnitude 4.0 earthquake that struck 72 km NW of Saipan, Northern Mariana Islands on April 15, 2025 at 19:20 UTC had a depth of 291.2 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 4.0 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 4.0 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: us7000pw4y). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2025, April 15, 2025). M4.0 Earthquake 72 km NW of Saipan, Northern Mariana Islands — April 15, 2025. Retrieved June 14, 2025 from https://www.earthquaketracker.org/earthquakes/event/us7000pw4y/