M4.1 Earthquake 30 km SE of Nichinan, Japan — February 22, 2024
2024-02-22 19:36:47 UTC (2024-02-22) · approx. 4:36 AM UTC+9 local
On February 22, 2024 at 19:36 UTC, a magnitude 4.1 shallow crustal earthquake struck 30 km SE of Nichinan, Japan, at a depth of 35.0 km and coordinates 31.4442°, 131.6292°.
Physical scale: An earthquake of magnitude 4.1 releases seismic energy equivalent to roughly 21 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 406 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
131.6292°E
Technical Information
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Common Questions
How strong was the magnitude 4.1 earthquake near Nichinan, Japan?
The magnitude 4.1 earthquake that struck 30 km SE of Nichinan, Japan on February 22, 2024 at 19:36 UTC had a depth of 35.0 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 4.1 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 4.1 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: us7000m0x0). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2024, February 22, 2024). M4.1 Earthquake 30 km SE of Nichinan, Japan — February 22, 2024. Retrieved May 2, 2024 from https://www.earthquaketracker.org/earthquakes/event/us7000m0x0/