M4.8 Earthquake 95 km S of Hirara, Japan — December 11, 2020
2020-12-11 12:58:06 UTC (2020-12-11) · approx. 8:58 PM UTC+8 local
On December 11, 2020 at 12:58 UTC, a magnitude 4.8 shallow crustal earthquake struck 95 km S of Hirara, Japan, at a depth of 26.6 km and coordinates 23.9426°, 125.3592°.
Physical scale: An earthquake of magnitude 4.8 releases seismic energy equivalent to roughly 239 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 1.2 km — a useful intuition for the size of the slip patch on the fault.
The epicenter is located in Japan, a region characterized by the intersection of four tectonic plates — Pacific, Philippine Sea, Eurasian, and North American — creating multiple subduction zones. The nearest mapped fault system is the Japan Trench. View all earthquakes in Japan.
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Earthquake Details
125.3592°E
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Common Questions
How strong was the magnitude 4.8 earthquake near Hirara, Japan?
The magnitude 4.8 earthquake that struck 95 km S of Hirara, Japan on December 11, 2020 at 12:58 UTC had a depth of 26.6 km. For context, this was a light earthquake commonly felt near the epicenter.
Where did the earthquake occur?
The earthquake epicenter was located at 23.9426°, 125.3592°, which is 95 km S of Hirara, Japan. View all earthquakes in Japan.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 4.8 earthquakes can continue for several days and gradually diminish over time.
Has Japan had earthquakes this big before?
The largest recorded earthquake in Japan was the M9.1 Tohoku earthquake of March 11, 2011. Today's magnitude 4.8 event is significantly smaller than that historical record.
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Location
Authoritative source: USGS event page (event ID: us7000cq92). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2020, December 11, 2020). M4.8 Earthquake 95 km S of Hirara, Japan — December 11, 2020. Retrieved February 20, 2021 from https://www.earthquaketracker.org/earthquakes/event/us7000cq92/