M4.3 Earthquake 82 km N of Tatsugō, Japan — September 7, 2023
2023-09-07 17:50:27 UTC (2023-09-07) · approx. 2:50 AM UTC+9 local
On September 7, 2023 at 17:50 UTC, a magnitude 4.3 shallow crustal earthquake struck 82 km N of Tatsugō, Japan, at a depth of 11.5 km and coordinates 29.1912°, 129.5325°.
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
129.5325°E
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Common Questions
How strong was the magnitude 4.3 earthquake near Tatsugō, Japan?
The magnitude 4.3 earthquake that struck 82 km N of Tatsugō, Japan on September 7, 2023 at 17:50 UTC had a depth of 11.5 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: us7000ku02). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2023, September 7, 2023). M4.3 Earthquake 82 km N of Tatsugō, Japan — September 7, 2023. Retrieved November 17, 2023 from https://www.earthquaketracker.org/earthquakes/event/us7000ku02/