M4.1 Earthquake 98 km NE of Miyako, Japan — November 8, 2021
2021-11-08 21:08:15 UTC (2021-11-08) · approx. 7:08 AM UTC+10 local
On November 8, 2021 at 21:08 UTC, a magnitude 4.1 shallow crustal earthquake struck 98 km NE of Miyako, Japan, at a depth of 38.2 km and coordinates 40.1846°, 142.8614°.
Physical scale: An earthquake of magnitude 4.1 releases seismic energy equivalent to roughly 21 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 406 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
142.8614°E
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Common Questions
How strong was the magnitude 4.1 earthquake near Miyako, Japan?
The magnitude 4.1 earthquake that struck 98 km NE of Miyako, Japan on November 8, 2021 at 21:08 UTC had a depth of 38.2 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 4.1 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 4.1 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: us7000ftke). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2021, November 8, 2021). M4.1 Earthquake 98 km NE of Miyako, Japan — November 8, 2021. Retrieved January 15, 2022 from https://www.earthquaketracker.org/earthquakes/event/us7000ftke/