M4.3 Earthquake 5 km N of Hitachi, Japan — August 20, 2026
2026-08-20 05:28:41 UTC (1 hour ago) · approx. 2:28 PM UTC+9 local
On August 20, 2026 at 05:28 UTC, a magnitude 4.3 shallow crustal earthquake struck 5 km N of Hitachi, Japan, at a depth of 47.8 km and coordinates 36.6510°, 140.6399°.
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
140.6399°E
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Common Questions
How strong was the magnitude 4.3 earthquake near Hitachi, Japan?
The magnitude 4.3 earthquake that struck 5 km N of Hitachi, Japan on August 20, 2026 at 05:28 UTC had a depth of 47.8 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: us6000tm2a). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2026, August 20, 2026). M4.3 Earthquake 5 km N of Hitachi, Japan — August 20, 2026. Retrieved August 20, 2026 from https://www.earthquaketracker.org/earthquakes/event/us6000tm2a/