M4.8 Earthquake 118 km E of Saipan, Northern Mariana Islands — July 5, 2025
2025-07-05 17:58:02 UTC (2025-07-05) · approx. 3:58 AM UTC+10 local
On July 5, 2025 at 17:58 UTC, a magnitude 4.8 shallow crustal earthquake struck 118 km E of Saipan, Northern Mariana Islands, at a depth of 35.0 km and coordinates 15.3171°, 146.8515°. This earthquake was detected by 106 seismic stations with good 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
146.8515°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 118 km E of Saipan, Northern Mariana Islands on July 5, 2025 at 17:58 UTC had a depth of 35.0 km. For context, this was a light earthquake commonly felt near the epicenter.
Where did the earthquake occur?
The earthquake epicenter was located at 15.3171°, 146.8515°, which is 118 km E 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: us7000qauy). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2025, July 5, 2025). M4.8 Earthquake 118 km E of Saipan, Northern Mariana Islands — July 5, 2025. Retrieved September 12, 2025 from https://www.earthquaketracker.org/earthquakes/event/us7000qauy/