M4.3 Earthquake 103 km ENE of Miyako, Japan — May 15, 2026
2026-05-15 20:39:39 UTC (2026-05-15) · approx. 6:39 AM UTC+10 local
On May 15, 2026 at 20:39 UTC, a magnitude 4.3 shallow crustal earthquake struck 103 km ENE of Miyako, Japan, at a depth of 37.2 km and coordinates 39.9359°, 143.0906°.
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
143.0906°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 4.3 earthquake near Miyako, Japan?
The magnitude 4.3 earthquake that struck 103 km ENE of Miyako, Japan on May 15, 2026 at 20:39 UTC had a depth of 37.2 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.
What should I do after an earthquake?
If you were in the affected area: check yourself and others for injuries, inspect your home for damage, and be prepared for aftershocks. For detailed guidance, see our earthquake safety guide and emergency planning resources.
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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: us6000szb3). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2026, May 15, 2026). M4.3 Earthquake 103 km ENE of Miyako, Japan — May 15, 2026. Retrieved June 10, 2026 from https://www.earthquaketracker.org/earthquakes/event/us6000szb3/