M4.0 Earthquake 7 km N of Fujikawaguchiko, Japan — December 12, 2020
2020-12-12 23:49:38 UTC (2020-12-12) · approx. 8:49 AM UTC+9 local
On December 12, 2020 at 23:49 UTC, a magnitude 4.0 intermediate depth earthquake struck 7 km N of Fujikawaguchiko, Japan, at a depth of 182.4 km and coordinates 35.5552°, 138.6886°.
Physical scale: An earthquake of magnitude 4.0 releases seismic energy equivalent to roughly 15 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 347 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
138.6886°E
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Common Questions
How strong was the magnitude 4.0 earthquake near Fujikawaguchiko, Japan?
The magnitude 4.0 earthquake that struck 7 km N of Fujikawaguchiko, Japan on December 12, 2020 at 23:49 UTC had a depth of 182.4 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 4.0 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 4.0 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: us7000crmq). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2020, December 12, 2020). M4.0 Earthquake 7 km N of Fujikawaguchiko, Japan — December 12, 2020. Retrieved February 20, 2021 from https://www.earthquaketracker.org/earthquakes/event/us7000crmq/