M4.4 Earthquake 147 km SE of Shinmachi, Japan — June 22, 2023
2023-06-22 20:51:51 UTC (2023-06-22) · approx. 5:51 AM UTC+9 local
On June 22, 2023 at 20:51 UTC, a magnitude 4.4 shallow crustal earthquake struck 147 km SE of Shinmachi, Japan, at a depth of 10.0 km and coordinates 34.3023°, 141.5669°.
Physical scale: An earthquake of magnitude 4.4 releases seismic energy equivalent to roughly 60 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 655 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
141.5669°E
Technical Information
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Common Questions
How strong was the magnitude 4.4 earthquake near Shinmachi, Japan?
The magnitude 4.4 earthquake that struck 147 km SE of Shinmachi, Japan on June 22, 2023 at 20:51 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 4.4 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 4.4 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: us7000kafz). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2023, June 22, 2023). M4.4 Earthquake 147 km SE of Shinmachi, Japan — June 22, 2023. Retrieved August 26, 2023 from https://www.earthquaketracker.org/earthquakes/event/us7000kafz/