M4.3 Earthquake near near the east coast of Honshu, Japan — September 21, 2022
2022-09-21 23:09:44 UTC (2022-09-21) · approx. 8:09 AM UTC+9 local
On September 21, 2022 at 23:09 UTC, a magnitude 4.3 shallow crustal earthquake struck near near the east coast of Honshu, Japan, at a depth of 36.3 km and coordinates 35.1003°, 141.2571°.
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
141.2571°E
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Common Questions
How strong was the magnitude 4.3 earthquake near near the east coast of Honshu, Japan?
The magnitude 4.3 earthquake that struck near near the east coast of Honshu, Japan on September 21, 2022 at 23:09 UTC had a depth of 36.3 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: us6000ip02). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2022, September 21, 2022). M4.3 Earthquake near near the east coast of Honshu, Japan — September 21, 2022. Retrieved November 26, 2022 from https://www.earthquaketracker.org/earthquakes/event/us6000ip02/