M4.0 Earthquake 267 km N of Saipan, Northern Mariana Islands — March 19, 2023
2023-03-19 20:13:41 UTC (2023-03-19) · approx. 6:13 AM UTC+10 local
On March 19, 2023 at 20:13 UTC, a magnitude 4.0 intermediate depth earthquake struck 267 km N of Saipan, Northern Mariana Islands, at a depth of 265.4 km and coordinates 17.6021°, 145.3779°.
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
145.3779°E
Technical Information
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Common Questions
How strong was the magnitude 4.0 earthquake near Saipan, Northern Mariana Islands?
The magnitude 4.0 earthquake that struck 267 km N of Saipan, Northern Mariana Islands on March 19, 2023 at 20:13 UTC had a depth of 265.4 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: us7000jmff). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2023, March 19, 2023). M4.0 Earthquake 267 km N of Saipan, Northern Mariana Islands — March 19, 2023. Retrieved May 26, 2023 from https://www.earthquaketracker.org/earthquakes/event/us7000jmff/