M4.2 Earthquake in the Mariana Islands region — October 2, 2023
2023-10-02 20:58:13 UTC (2023-10-02) · approx. 6:58 AM UTC+10 local
On October 2, 2023 at 20:58 UTC, a magnitude 4.2 intermediate depth earthquake struck in the Mariana Islands region, at a depth of 270.5 km and coordinates 21.6391°, 143.4424°.
Physical scale: An earthquake of magnitude 4.2 releases seismic energy equivalent to roughly 30 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 476 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
143.4424°E
Technical Information
Common Questions
How strong was the magnitude 4.2 earthquake in the Mariana Islands region?
The magnitude 4.2 earthquake that struck in the Mariana Islands region on October 2, 2023 at 20:58 UTC had a depth of 270.5 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 4.2 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 4.2 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: us6000ldhw). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2023, October 2, 2023). M4.2 Earthquake in the Mariana Islands region — October 2, 2023. Retrieved December 14, 2023 from https://www.earthquaketracker.org/earthquakes/event/us6000ldhw/