M4.0 Earthquake 119 km WNW of Suttsu, Japan — September 22, 2023
2023-09-22 19:13:40 UTC (2023-09-22) · approx. 4:13 AM UTC+9 local
On September 22, 2023 at 19:13 UTC, a magnitude 4.0 intermediate depth earthquake struck 119 km WNW of Suttsu, Japan, at a depth of 218.2 km and coordinates 43.3460°, 138.9676°.
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
138.9676°E
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Common Questions
How strong was the magnitude 4.0 earthquake near Suttsu, Japan?
The magnitude 4.0 earthquake that struck 119 km WNW of Suttsu, Japan on September 22, 2023 at 19:13 UTC had a depth of 218.2 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: us7000kxi2). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2023, September 22, 2023). M4.0 Earthquake 119 km WNW of Suttsu, Japan — September 22, 2023. Retrieved January 18, 2024 from https://www.earthquaketracker.org/earthquakes/event/us7000kxi2/