M4.3 Earthquake 19 km N of Kokubu-matsuki, Japan — November 28, 2021
2021-11-28 22:27:32 UTC (2021-11-28) · approx. 7:27 AM UTC+9 local
On November 28, 2021 at 22:27 UTC, a magnitude 4.3 shallow crustal earthquake struck 19 km N of Kokubu-matsuki, Japan, at a depth of 10.0 km and coordinates 31.9107°, 130.7760°.
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
130.7760°E
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Common Questions
How strong was the magnitude 4.3 earthquake near Kokubu-matsuki, Japan?
The magnitude 4.3 earthquake that struck 19 km N of Kokubu-matsuki, Japan on November 28, 2021 at 22:27 UTC had a depth of 10.0 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: us6000g8gx). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2021, November 28, 2021). M4.3 Earthquake 19 km N of Kokubu-matsuki, Japan — November 28, 2021. Retrieved February 5, 2022 from https://www.earthquaketracker.org/earthquakes/event/us6000g8gx/