M4.3 Earthquake near near the east coast of Honshu, Japan — February 12, 2023
2023-02-12 18:44:32 UTC (2023-02-12) · approx. 3:44 AM UTC+9 local
On February 12, 2023 at 18:44 UTC, a magnitude 4.3 intermediate depth earthquake struck near near the east coast of Honshu, Japan, at a depth of 109.7 km and coordinates 40.4059°, 141.5982°.
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
141.5982°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 February 12, 2023 at 18:44 UTC had a depth of 109.7 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: us6000jnh4). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2023, February 12, 2023). M4.3 Earthquake near near the east coast of Honshu, Japan — February 12, 2023. Retrieved April 22, 2023 from https://www.earthquaketracker.org/earthquakes/event/us6000jnh4/