M4.3 Earthquake 150 km ENE of Noda, Japan — November 21, 2025
2025-11-21 22:49:08 UTC (2025-11-21) · approx. 8:49 AM UTC+10 local
On November 21, 2025 at 22:49 UTC, a magnitude 4.3 shallow crustal earthquake struck 150 km ENE of Noda, Japan, at a depth of 36.1 km and coordinates 40.5562°, 143.4907°.
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
143.4907°E
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Common Questions
How strong was the magnitude 4.3 earthquake near Noda, Japan?
The magnitude 4.3 earthquake that struck 150 km ENE of Noda, Japan on November 21, 2025 at 22:49 UTC had a depth of 36.1 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: us6000rtnu). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2025, November 21, 2025). M4.3 Earthquake 150 km ENE of Noda, Japan — November 21, 2025. Retrieved February 20, 2026 from https://www.earthquaketracker.org/earthquakes/event/us6000rtnu/