M3.8 Earthquake in the Pagan region, Northern Mariana Islands — February 21, 2025
2025-02-21 21:57:20 UTC (2025-02-21) · approx. 7:57 AM UTC+10 local
On February 21, 2025 at 21:57 UTC, a magnitude 3.8 intermediate depth earthquake struck in the Pagan region, Northern Mariana Islands, at a depth of 143.5 km and coordinates 18.5751°, 145.5384°.
Physical scale: An earthquake of magnitude 3.8 releases seismic energy equivalent to roughly 7.6 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 252 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
145.5384°E
Technical Information
Common Questions
How strong was the magnitude 3.8 earthquake in the Pagan region, Northern Mariana Islands?
The magnitude 3.8 earthquake that struck in the Pagan region, Northern Mariana Islands on February 21, 2025 at 21:57 UTC had a depth of 143.5 km. For context, this was a minor earthquake typically detected only by instruments.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 3.8 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 3.8 earthquakes are typically only recorded by instruments.
Authoritative source: USGS event page (event ID: us6000pw48). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2025, February 21, 2025). M3.8 Earthquake in the Pagan region, Northern Mariana Islands — February 21, 2025. Retrieved May 6, 2025 from https://www.earthquaketracker.org/earthquakes/event/us6000pw48/