M4.4 Earthquake 46 km ENE of Onagawa Chō, Japan — July 20, 2024
2024-07-20 20:46:41 UTC (2024-07-20) · approx. 5:46 AM UTC+9 local
On July 20, 2024 at 20:46 UTC, a magnitude 4.4 shallow crustal earthquake struck 46 km ENE of Onagawa Chō, Japan, at a depth of 39.3 km and coordinates 38.6288°, 141.9287°.
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.
Earthquake Details
141.9287°E
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Common Questions
How strong was the magnitude 4.4 earthquake near Onagawa Chō, Japan?
The magnitude 4.4 earthquake that struck 46 km ENE of Onagawa Chō, Japan on July 20, 2024 at 20:46 UTC had a depth of 39.3 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.
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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: us7000n0iy). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2024, July 20, 2024). M4.4 Earthquake 46 km ENE of Onagawa Chō, Japan — July 20, 2024. Retrieved September 28, 2024 from https://www.earthquaketracker.org/earthquakes/event/us7000n0iy/