M4.3 Earthquake 82 km SSE of Akkeshi, Japan — June 22, 2026
2026-06-22 23:03:37 UTC (2026-06-22) · approx. 9:03 AM UTC+10 local
On June 22, 2026 at 23:03 UTC, a magnitude 4.3 shallow crustal earthquake struck 82 km SSE of Akkeshi, Japan, at a depth of 35.0 km and coordinates 42.4118°, 145.3932°.
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
145.3932°E
Technical Information
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Common Questions
How strong was the magnitude 4.3 earthquake near Akkeshi, Japan?
The magnitude 4.3 earthquake that struck 82 km SSE of Akkeshi, Japan on June 22, 2026 at 23:03 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 4.3 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: us6000t8ik). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2026, June 22, 2026). M4.3 Earthquake 82 km SSE of Akkeshi, Japan — June 22, 2026. Retrieved June 29, 2026 from https://www.earthquaketracker.org/earthquakes/event/us6000t8ik/