M4.3 Earthquake 70 km SSE of Onagawa Chō, Japan — February 26, 2024
2024-02-26 21:40:17 UTC (2024-02-26) · approx. 6:40 AM UTC+9 local
On February 26, 2024 at 21:40 UTC, a magnitude 4.3 shallow crustal earthquake struck 70 km SSE of Onagawa Chō, Japan, at a depth of 48.5 km and coordinates 37.8768°, 141.8042°.
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
141.8042°E
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Common Questions
How strong was the magnitude 4.3 earthquake near Onagawa Chō, Japan?
The magnitude 4.3 earthquake that struck 70 km SSE of Onagawa Chō, Japan on February 26, 2024 at 21:40 UTC had a depth of 48.5 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: us7000m1r0). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2024, February 26, 2024). M4.3 Earthquake 70 km SSE of Onagawa Chō, Japan — February 26, 2024. Retrieved May 10, 2024 from https://www.earthquaketracker.org/earthquakes/event/us7000m1r0/