M4.4 Earthquake 30 km SE of Owase, Japan — April 30, 2021
2021-04-30 17:45:42 UTC (2021-04-30) · approx. 2:45 AM UTC+9 local
On April 30, 2021 at 17:45 UTC, a magnitude 4.4 deep-focus earthquake struck 30 km SE of Owase, Japan, at a depth of 387.5 km and coordinates 33.8776°, 136.4420°.
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.
Did You Feel It? — community-reported shaking
Aggregated felt-report intensity from 1 citizen response to the USGS Did You Feel It? system. Each colored zone represents the average MMI from reports in that area.
Source: U.S. Geological Survey Did You Feel It?. View on USGS · submit your own report
Earthquake Details
136.4420°E
Technical Information
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Common Questions
How strong was the magnitude 4.4 earthquake near Owase, Japan?
The magnitude 4.4 earthquake that struck 30 km SE of Owase, Japan on April 30, 2021 at 17:45 UTC had a depth of 387.5 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: us7000dz29). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2021, April 30, 2021). M4.4 Earthquake 30 km SE of Owase, Japan — April 30, 2021. Retrieved July 10, 2021 from https://www.earthquaketracker.org/earthquakes/event/us7000dz29/