M4.4 Earthquake 63 km SE of Yonakuni, Japan — April 16, 2021
2021-04-16 15:11:52 UTC (2021-04-16) · approx. 11:11 PM UTC+8 local
On April 16, 2021 at 15:11 UTC, a magnitude 4.4 shallow crustal earthquake struck 63 km SE of Yonakuni, Japan, at a depth of 17.8 km and coordinates 24.1186°, 123.4987°.
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
123.4987°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 63 km SE of Yonakuni, Japan on April 16, 2021 at 15:11 UTC had a depth of 17.8 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: us6000e3nc). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2021, April 16, 2021). M4.4 Earthquake 63 km SE of Yonakuni, Japan — April 16, 2021. Retrieved July 3, 2021 from https://www.earthquaketracker.org/earthquakes/event/us6000e3nc/