M4.3 Earthquake near eastern Honshu, Japan — March 13, 2023
2023-03-13 20:35:35 UTC (2023-03-13) · approx. 5:35 AM UTC+9 local
On March 13, 2023 at 20:35 UTC, a magnitude 4.3 shallow crustal earthquake struck near eastern Honshu, Japan, at a depth of 68.1 km and coordinates 39.8224°, 141.7168°.
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
141.7168°E
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Common Questions
How strong was the magnitude 4.3 earthquake near eastern Honshu, Japan?
The magnitude 4.3 earthquake that struck near eastern Honshu, Japan on March 13, 2023 at 20:35 UTC had a depth of 68.1 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: us7000jjml). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2023, March 13, 2023). M4.3 Earthquake near eastern Honshu, Japan — March 13, 2023. Retrieved May 20, 2023 from https://www.earthquaketracker.org/earthquakes/event/us7000jjml/