M4.3 Earthquake 28 km SSE of Saiki, Japan — January 21, 2022
2022-01-21 21:48:14 UTC (2022-01-21) · approx. 6:48 AM UTC+9 local
On January 21, 2022 at 21:48 UTC, a magnitude 4.3 shallow crustal earthquake struck 28 km SSE of Saiki, Japan, at a depth of 60.3 km and coordinates 32.7029°, 131.9771°.
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
131.9771°E
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Common Questions
How strong was the magnitude 4.3 earthquake near Saiki, Japan?
The magnitude 4.3 earthquake that struck 28 km SSE of Saiki, Japan on January 21, 2022 at 21:48 UTC had a depth of 60.3 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: us7000ge17). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2022, January 21, 2022). M4.3 Earthquake 28 km SSE of Saiki, Japan — January 21, 2022. Retrieved April 1, 2022 from https://www.earthquaketracker.org/earthquakes/event/us7000ge17/