M4.1 Earthquake near near the east coast of Honshu, Japan — December 16, 2020
2020-12-16 23:18:19 UTC (2020-12-16) · approx. 8:18 AM UTC+9 local
On December 16, 2020 at 23:18 UTC, a magnitude 4.1 intermediate depth earthquake struck near near the east coast of Honshu, Japan, at a depth of 77.6 km and coordinates 36.0150°, 140.0588°.
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
140.0588°E
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Common Questions
How strong was the magnitude 4.1 earthquake near near the east coast of Honshu, Japan?
The magnitude 4.1 earthquake that struck near near the east coast of Honshu, Japan on December 16, 2020 at 23:18 UTC had a depth of 77.6 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: us7000crpk). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2020, December 16, 2020). M4.1 Earthquake near near the east coast of Honshu, Japan — December 16, 2020. Retrieved February 27, 2021 from https://www.earthquaketracker.org/earthquakes/event/us7000crpk/