M4.3 Earthquake 70 km S of San Jose Village, Northern Mariana Islands — September 28, 2025
2025-09-28 23:57:41 UTC (2025-09-28) · approx. 9:57 AM UTC+10 local
On September 28, 2025 at 23:57 UTC, a magnitude 4.3 intermediate depth earthquake struck 70 km S of San Jose Village, Northern Mariana Islands, at a depth of 108.5 km and coordinates 14.3331°, 145.6178°.
Physical scale: An earthquake of magnitude 4.3 releases seismic energy equivalent to roughly 43 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 558 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
145.6178°E
Technical Information
Common Questions
How strong was the magnitude 4.3 earthquake near San Jose Village, Northern Mariana Islands?
The magnitude 4.3 earthquake that struck 70 km S of San Jose Village, Northern Mariana Islands on September 28, 2025 at 23:57 UTC had a depth of 108.5 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 4.3 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 4.3 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: us6000ribf). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2025, September 28, 2025). M4.3 Earthquake 70 km S of San Jose Village, Northern Mariana Islands — September 28, 2025. Retrieved December 11, 2025 from https://www.earthquaketracker.org/earthquakes/event/us6000ribf/