M4.4 Earthquake 71 km NNW of Yonakuni, Japan — May 30, 2021
2021-05-30 16:26:31 UTC (2021-05-30) · approx. 12:26 AM UTC+8 local
On May 30, 2021 at 16:26 UTC, a magnitude 4.4 shallow crustal earthquake struck 71 km NNW of Yonakuni, Japan, at a depth of 10.0 km and coordinates 25.0267°, 122.6410°.
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
122.6410°E
Technical Information
Common Questions
How strong was the magnitude 4.4 earthquake near Yonakuni, Japan?
The magnitude 4.4 earthquake that struck 71 km NNW of Yonakuni, Japan on May 30, 2021 at 16:26 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: us7000e9f5). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2021, May 30, 2021). M4.4 Earthquake 71 km NNW of Yonakuni, Japan — May 30, 2021. Retrieved August 7, 2021 from https://www.earthquaketracker.org/earthquakes/event/us7000e9f5/