M4.3 Earthquake in the Pagan region, Northern Mariana Islands — November 4, 2021
2021-11-04 16:16:56 UTC (2021-11-04) · approx. 2:16 AM UTC+10 local
On November 4, 2021 at 16:16 UTC, a magnitude 4.3 deep-focus earthquake struck in the Pagan region, Northern Mariana Islands, at a depth of 588.8 km and coordinates 18.9783°, 145.0056°.
Physical scale: An earthquake of magnitude 4.3 releases seismic energy equivalent to roughly 43 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 558 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
145.0056°E
Technical Information
Common Questions
How strong was the magnitude 4.3 earthquake in the Pagan region, Northern Mariana Islands?
The magnitude 4.3 earthquake that struck in the Pagan region, Northern Mariana Islands on November 4, 2021 at 16:16 UTC had a depth of 588.8 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 4.3 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 4.3 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: us7000fsr2). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2021, November 4, 2021). M4.3 Earthquake in the Pagan region, Northern Mariana Islands — November 4, 2021. Retrieved January 14, 2022 from https://www.earthquaketracker.org/earthquakes/event/us7000fsr2/