M4.4 Earthquake 56 km SSW of Yonakuni, Japan — September 17, 2022
2022-09-17 19:25:57 UTC (2022-09-17) · approx. 3:25 AM UTC+8 local
On September 17, 2022 at 19:25 UTC, a magnitude 4.4 shallow crustal earthquake struck 56 km SSW of Yonakuni, Japan, at a depth of 39.7 km and coordinates 23.9994°, 122.7765°.
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
122.7765°E
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Common Questions
How strong was the magnitude 4.4 earthquake near Yonakuni, Japan?
The magnitude 4.4 earthquake that struck 56 km SSW of Yonakuni, Japan on September 17, 2022 at 19:25 UTC had a depth of 39.7 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 4.4 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: us7000i8wh). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2022, September 17, 2022). M4.4 Earthquake 56 km SSW of Yonakuni, Japan — September 17, 2022. Retrieved November 26, 2022 from https://www.earthquaketracker.org/earthquakes/event/us7000i8wh/