M4.4 Earthquake 14 km ESE of Shimabara, Japan — July 29, 2026
2026-07-29 11:47:53 UTC (2 hours ago) · approx. 8:47 PM UTC+9 local
On July 29, 2026 at 11:47 UTC, a magnitude 4.4 shallow crustal earthquake struck 14 km ESE of Shimabara, Japan, at a depth of 10.0 km and coordinates 32.7155°, 130.5047°.
Physical scale: An earthquake of magnitude 4.4 releases seismic energy equivalent to roughly 60 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 655 m — a useful intuition for the size of the slip patch on the fault.
This earthquake is part of an ongoing aftershock sequence following the magnitude 5.4 mainshock that occurred 1 hour ago 11 km N of Tsunagi, Japan. Since the mainshock, the USGS has recorded 2 aftershocks in this area. Aftershock activity is expected to continue for days to weeks as stresses on surrounding faults redistribute.
Earthquake Details
130.5047°E
Technical Information
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Common Questions
How strong was the magnitude 4.4 earthquake near Shimabara, Japan?
The magnitude 4.4 earthquake that struck 14 km ESE of Shimabara, Japan on July 29, 2026 at 11:47 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 4.4 earthquakes can continue for several days and gradually diminish over time.
Is this the same earthquake as the M5.4 one earlier?
No. This magnitude 4.4 earthquake is an aftershock of the larger magnitude 5.4 mainshock that occurred earlier 11 km N of Tsunagi, Japan. Aftershocks are smaller earthquakes triggered by stress changes from the mainshock.
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Understanding This Data
Magnitude 4.4 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: us6000tgmj). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2026, July 29, 2026). M4.4 Earthquake 14 km ESE of Shimabara, Japan — July 29, 2026. Retrieved July 29, 2026 from https://www.earthquaketracker.org/earthquakes/event/us6000tgmj/