M5.3 Earthquake in the Maug Islands region, Northern Mariana Islands — November 4, 2021
2021-11-04 15:46:38 UTC (2021-11-04) · approx. 1:46 AM UTC+10 local
On November 4, 2021 at 15:46 UTC, a magnitude 5.3 deep-focus earthquake struck in the Maug Islands region, Northern Mariana Islands, at a depth of 562.7 km and coordinates 19.0213°, 145.0577°.
Physical scale: An earthquake of magnitude 5.3 releases seismic energy equivalent to roughly 1 kilotons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 2.7 km — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
145.0577°E
Technical Information
Common Questions
How strong was the magnitude 5.3 earthquake in the Maug Islands region, Northern Mariana Islands?
The magnitude 5.3 earthquake that struck in the Maug Islands region, Northern Mariana Islands on November 4, 2021 at 15:46 UTC had a depth of 562.7 km. For context, this was a moderate earthquake that could be widely felt.
Where did the earthquake occur?
The earthquake epicenter was located at 19.0213°, 145.0577°, which is in the Maug Islands region, Northern Mariana Islands.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 5.3 earthquakes can continue for days to weeks and gradually diminish over time.
Actions
Authoritative source: USGS event page (event ID: us7000frem). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2021, November 4, 2021). M5.3 Earthquake in the Maug Islands region, Northern Mariana Islands — November 4, 2021. Retrieved December 22, 2025 from https://www.earthquaketracker.org/earthquakes/event/us7000frem/