M4.4 Earthquake 86 km S of Ōyama, Japan — December 26, 2023
2023-12-26 23:43:49 UTC (2023-12-26) · approx. 8:43 AM UTC+9 local
On December 26, 2023 at 23:43 UTC, a magnitude 4.4 intermediate depth earthquake struck 86 km S of Ōyama, Japan, at a depth of 272.9 km and coordinates 33.8220°, 138.2459°.
Physical scale: An earthquake of magnitude 4.4 releases seismic energy equivalent to roughly 60 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 655 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
138.2459°E
Technical Information
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Common Questions
How strong was the magnitude 4.4 earthquake near Ōyama, Japan?
The magnitude 4.4 earthquake that struck 86 km S of Ōyama, Japan on December 26, 2023 at 23:43 UTC had a depth of 272.9 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 4.4 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 4.4 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: us6000lzxy). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2023, December 26, 2023). M4.4 Earthquake 86 km S of Ōyama, Japan — December 26, 2023. Retrieved March 2, 2024 from https://www.earthquaketracker.org/earthquakes/event/us6000lzxy/