M4.0 Earthquake 32 km E of Hachinohe, Japan — July 12, 2023
2023-07-12 20:41:21 UTC (2023-07-12) · approx. 5:41 AM UTC+9 local
On July 12, 2023 at 20:41 UTC, a magnitude 4.0 shallow crustal earthquake struck 32 km E of Hachinohe, Japan, at a depth of 62.2 km and coordinates 40.4858°, 141.8844°.
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
141.8844°E
Technical Information
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Common Questions
How strong was the magnitude 4.0 earthquake near Hachinohe, Japan?
The magnitude 4.0 earthquake that struck 32 km E of Hachinohe, Japan on July 12, 2023 at 20:41 UTC had a depth of 62.2 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 4.0 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: us7000kf9e). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2023, July 12, 2023). M4.0 Earthquake 32 km E of Hachinohe, Japan — July 12, 2023. Retrieved September 16, 2023 from https://www.earthquaketracker.org/earthquakes/event/us7000kf9e/