M4.3 Earthquake 7 km ENE of Narut?, Japan — April 17, 2021
2021-04-17 20:45:23 UTC (2021-04-17) · approx. 5:45 AM UTC+9 local
On April 17, 2021 at 20:45 UTC, a magnitude 4.3 shallow crustal earthquake struck 7 km ENE of Narut?, Japan, at a depth of 53.3 km and coordinates 35.6298°, 140.4877°.
Physical scale: An earthquake of magnitude 4.3 releases seismic energy equivalent to roughly 43 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 558 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
140.4877°E
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Common Questions
How strong was the magnitude 4.3 earthquake near Narut?, Japan?
The magnitude 4.3 earthquake that struck 7 km ENE of Narut?, Japan on April 17, 2021 at 20:45 UTC had a depth of 53.3 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 4.3 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 4.3 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: us6000e3qa). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2021, April 17, 2021). M4.3 Earthquake 7 km ENE of Narut?, Japan — April 17, 2021. Retrieved July 3, 2021 from https://www.earthquaketracker.org/earthquakes/event/us6000e3qa/