M4.0 Earthquake 37 km W of Imabetsu, Japan — November 3, 2023
2023-11-03 20:05:54 UTC (2023-11-03) · approx. 5:05 AM UTC+9 local
On November 3, 2023 at 20:05 UTC, a magnitude 4.0 intermediate depth earthquake struck 37 km W of Imabetsu, Japan, at a depth of 170.7 km and coordinates 41.1438°, 140.0351°.
Physical scale: An earthquake of magnitude 4.0 releases seismic energy equivalent to roughly 15 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 347 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
140.0351°E
Technical Information
Common Questions
How strong was the magnitude 4.0 earthquake near Imabetsu, Japan?
The magnitude 4.0 earthquake that struck 37 km W of Imabetsu, Japan on November 3, 2023 at 20:05 UTC had a depth of 170.7 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 4.0 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 4.0 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: us7000l9n4). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2023, November 3, 2023). M4.0 Earthquake 37 km W of Imabetsu, Japan — November 3, 2023. Retrieved January 10, 2024 from https://www.earthquaketracker.org/earthquakes/event/us7000l9n4/