M4.3 Earthquake near Sea of Japan — January 1, 2023
2023-01-01 23:27:38 UTC (2023-01-01) · approx. 8:27 AM UTC+9 local
On January 1, 2023 at 23:27 UTC, a magnitude 4.3 deep-focus earthquake struck near Sea of Japan, at a depth of 369.1 km and coordinates 37.0510°, 135.2387°.
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
135.2387°E
Technical Information
Common Questions
How strong was the magnitude 4.3 earthquake near Sea of Japan?
The magnitude 4.3 earthquake that struck near Sea of Japan on January 1, 2023 at 23:27 UTC had a depth of 369.1 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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Location
Understanding This Data
Magnitude 4.3 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: us7000j1hk). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2023, January 1, 2023). M4.3 Earthquake near Sea of Japan — January 1, 2023. Retrieved March 11, 2023 from https://www.earthquaketracker.org/earthquakes/event/us7000j1hk/