M4.4 Earthquake 57 km NNE of Miyako, Japan — October 5, 2021
2021-10-05 22:33:41 UTC (2021-10-05) · approx. 7:33 AM UTC+9 local
On October 5, 2021 at 22:33 UTC, a magnitude 4.4 shallow crustal earthquake struck 57 km NNE of Miyako, Japan, at a depth of 56.9 km and coordinates 40.1318°, 142.1822°.
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
142.1822°E
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Common Questions
How strong was the magnitude 4.4 earthquake near Miyako, Japan?
The magnitude 4.4 earthquake that struck 57 km NNE of Miyako, Japan on October 5, 2021 at 22:33 UTC had a depth of 56.9 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: us6000ft14). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2021, October 5, 2021). M4.4 Earthquake 57 km NNE of Miyako, Japan — October 5, 2021. Retrieved December 10, 2021 from https://www.earthquaketracker.org/earthquakes/event/us6000ft14/