M4.8 Earthquake 120 km N of Saipan, Northern Mariana Islands — June 25, 2025
2025-06-25 18:54:44 UTC (2025-06-25) · approx. 4:54 AM UTC+10 local
On June 25, 2025 at 18:54 UTC, a magnitude 4.8 deep-focus earthquake struck 120 km N of Saipan, Northern Mariana Islands, at a depth of 535.7 km and coordinates 16.2905°, 145.6009°. This earthquake was detected by 142 seismic stations with excellent location accuracy and was assigned a USGS significance rating of 354, placing it among routine seismic activity.
Physical scale: An earthquake of magnitude 4.8 releases seismic energy equivalent to roughly 239 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 1.2 km — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
145.6009°E
Technical Information
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Common Questions
How strong was the magnitude 4.8 earthquake near Saipan, Northern Mariana Islands?
The magnitude 4.8 earthquake that struck 120 km N of Saipan, Northern Mariana Islands on June 25, 2025 at 18:54 UTC had a depth of 535.7 km. For context, this was a light earthquake commonly felt near the epicenter.
Where did the earthquake occur?
The earthquake epicenter was located at 16.2905°, 145.6009°, which is 120 km N of Saipan, Northern Mariana Islands.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 4.8 earthquakes can continue for several days and gradually diminish over time.
Actions
Authoritative source: USGS event page (event ID: us7000q8s7). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2025, June 25, 2025). M4.8 Earthquake 120 km N of Saipan, Northern Mariana Islands — June 25, 2025. Retrieved September 4, 2025 from https://www.earthquaketracker.org/earthquakes/event/us7000q8s7/