M4.2 Earthquake 134 km SSE of Ishigaki, Japan — April 12, 2025
2025-04-12 17:42:58 UTC (2025-04-12) · approx. 1:42 AM UTC+8 local
On April 12, 2025 at 17:42 UTC, a magnitude 4.2 shallow crustal earthquake struck 134 km SSE of Ishigaki, Japan, at a depth of 10.0 km and coordinates 23.1897°, 124.5524°.
Physical scale: An earthquake of magnitude 4.2 releases seismic energy equivalent to roughly 30 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 476 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
124.5524°E
Technical Information
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Common Questions
How strong was the magnitude 4.2 earthquake near Ishigaki, Japan?
The magnitude 4.2 earthquake that struck 134 km SSE of Ishigaki, Japan on April 12, 2025 at 17:42 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 4.2 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 4.2 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: us6000q5n9). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2025, April 12, 2025). M4.2 Earthquake 134 km SSE of Ishigaki, Japan — April 12, 2025. Retrieved June 14, 2025 from https://www.earthquaketracker.org/earthquakes/event/us6000q5n9/