M4.4 Earthquake 150 km N of Saipan, Northern Mariana Islands — September 5, 2023
2023-09-05 19:45:56 UTC (2023-09-05) · approx. 5:45 AM UTC+10 local
On September 5, 2023 at 19:45 UTC, a magnitude 4.4 intermediate depth earthquake struck 150 km N of Saipan, Northern Mariana Islands, at a depth of 171.1 km and coordinates 16.5619°, 145.5558°.
Physical scale: An earthquake of magnitude 4.4 releases seismic energy equivalent to roughly 60 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 655 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
145.5558°E
Technical Information
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Common Questions
How strong was the magnitude 4.4 earthquake near Saipan, Northern Mariana Islands?
The magnitude 4.4 earthquake that struck 150 km N of Saipan, Northern Mariana Islands on September 5, 2023 at 19:45 UTC had a depth of 171.1 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 4.4 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 4.4 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: us7000kuan). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2023, September 5, 2023). M4.4 Earthquake 150 km N of Saipan, Northern Mariana Islands — September 5, 2023. Retrieved November 17, 2023 from https://www.earthquaketracker.org/earthquakes/event/us7000kuan/