M4.0 Earthquake 7 km SSW of Maebaru-chūō, Japan — August 16, 2026
2026-08-16 21:37:17 UTC (2026-08-16) · approx. 6:37 AM UTC+9 local
On August 16, 2026 at 21:37 UTC, a magnitude 4.0 shallow crustal earthquake struck 7 km SSW of Maebaru-chūō, Japan, at a depth of 10.0 km and coordinates 33.4995°, 130.1715°.
Physical scale: An earthquake of magnitude 4.0 releases seismic energy equivalent to roughly 15 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 347 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
130.1715°E
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Common Questions
How strong was the magnitude 4.0 earthquake near Maebaru-chūō, Japan?
The magnitude 4.0 earthquake that struck 7 km SSW of Maebaru-chūō, Japan on August 16, 2026 at 21:37 UTC had a depth of 10.0 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 4.0 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 4.0 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: usd0015eab). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2026, August 16, 2026). M4.0 Earthquake 7 km SSW of Maebaru-chūō, Japan — August 16, 2026. Retrieved September 9, 2026 from https://www.earthquaketracker.org/earthquakes/event/usd0015eab/